CCNP交换（300-115）考试新题汇总（6月5日更新）

小乔

& C$ W& w$ F& P  I& |% J1. What is the Ethernet frame size for 802.1Q?
5 T1 Z: I, a/ l) c; n+ R0 j( D7 @3 Ja. 64
b. 128
c. 1518
) i1 |' j. s# u2 i$ Ed. 1522 **
Ans: D
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2. How will the traffic reach the core switch from AS switch to DS core switch?
(Based on a topology shown with one core, two distribution and two access switches on each distribution switch, with redundant links and bandwidth mentioned.)
a. ASW1 to DWS1 to core
& P% U1 e, M( P2 i+ Fb. ASW1 to DWS2 to core **
; O% W( \! h0 H6 R" Jc. ???
1 x* h% e4 `( q' W: u# L/ G7 od. ???
Ans: B
- ]+ X  I/ L( h1 g+ T————————————————————————————————————————————————————————————
3. If HSRP group number is 45 what would be the MAC address?
(Basically conversion of digit to hexadecimal with group of 16.)
- R) L1 x1 G7 k/ p9 v, Ta. 00-00-0c-07-ac-2D
- D! I( N- B2 j; u$ Q, |9 ]b. ???
# f$ |3 \+ I9 ~/ N; a2 g1 Jc. ???
d. ???
Ans: A
Explanation:
( ]$ b0 a) q0 B; D% x! [00-00-0c- 07-ac-2D
) o$ z/ j+ b+ n# mCISCO_ID :HSRP_ID:GROUP_ID
2d=45
————————————————————————————————————————————————————————————
6 G' w' d6 ]8 s8 ~; T7 s- Y4 A question on EtherChannel misconfiguration…….
a. Enable this feature by using the spanning-tree etherchannel guard misconfig global configuration command. **
b. ???
, Q( n# H/ R9 g2 t* e2 gc. ???
$ |  D6 X2 B& D8 L" ]  L8 D9 A, Od. ???
/ r* F3 F% Y6 k: F" a! a1 w5 O4 [Ans: A
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5. Select a valid VRRP configuration from a list of possible configurations.
+ P3 m6 O( L0 \  q% Xa. vrrp [group-number] ip [ip-address] **
& E% M) W! `, T1 [b. vrrp [group-number] priority [priority] **
c. vrrp [group-number] preempt **
d. ???
e. ???
Ans: A,B,C
Explanation:
You can eliminate configurations with the word ‘standby’, as that would be HSRP, not VRRP. Also, I think the options that put things like vrrp group 1 ip x.x.x.x are wrong. You don’t need the word ‘group’ in the configuration line. The number 1 is the group number. Anyway, just take a good look a t a few valid VRRP configuration examples so that you will be able to recognize invalid ones.
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. \0 U* Y' u. I& e6. Private VLANs (PVLANs) have two secondary VLAN types.
0 |9 ]/ p; {1 K. Z& Ra. community **
b. isolated **
c. ???
2 d) B" x5 }+ \1 L; G  Hd. ???
e. ???
9 Z) c& U& c! }: QAns: A,B
' A1 U+ n/ P9 G- b# ~( M" l' {____________________________________________________________
$ g9 h& ?; C) W9 @0 B7. What types of SDM templates you can use in switch? (Choose three)
' S) g5 S5 _( I2 m# Ia. Access **
b. Default **
$ K! f& S# N: ~! |6 ^5 ^! w( a  Xc. Routing **
d. VLANs **
. G# z7 I$ }1 X6 D- X1 E$ j" Se. ???
' q" L, V. v8 S& \6 d0 i$ gf. ???
Ans: A,B,C,D (note: the question asks for 3, so 3 of the 4 correct options should be in the real exam)
1 ?9 `# d3 ]2 E3 q/ DExplanation:
' x+ z( l, s1 @  h+ Y# D/ O+ Access – The access template maximizes system resources for access control lists (ACLs) to accommodate a large number of ACLs.
- u0 L# y6 A& O+ Default – The default template gives balance to all functions.
+ Routing – The routing template maximizes system resources for IPv4 unicast routing, typically required for a router or aggregator in the center of a network.
+ VLANs – The VLAN template disables routing and supports the maximum number of unicast MAC addresses. It would typically be selected for a Layer 2 switch.
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# b8 f$ t1 d* T9 k4 Y1 W1 W9 _* i. D8. EtherChannel – what is the process to configure EtherChannel.
4 p9 B8 T" y& J2 ra. shutdown both interface ports **
b. shutdown the interface on one side only
c. ???
d. ???
+ D( p! n7 F; O# \/ ]  ?$ \  `Ans: A
! r" o7 N: N- O' B7 q____________________________________________________________
1 k; h" b6 M0 N+ m9. A question about spanning-tree port-priority.
0 e4 n1 j; g9 ^a. 127 **
& g$ B/ }+ K2 R' Z5 K7 Ub. 129
c. ???
d. ???
( I  l$ s. e4 R' A5 w/ xAns: A
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  M( T: N) J  G7 n5 i  N3 m10. Question about EtherChannel based on STP EtherChannel misconfig……
& D, ^8 |$ D! |9 D' ta. (config)# spanning-tree etherchannel guard misconfig **
% m2 t* O2 z$ L7 T) e6 w1 ^# G$ G, gb. (config-if)# spanning-tree etherchannel guard misconfig
c. ???
d. ???
Ans: A
' k0 \9 e1 Z* e' O' \________________________
4 W7 H( |- z) ?+ `! I

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11. If HSRP group number is 37, what would be the MAC address?
9 W; N- g: Q: L5 a! ma. 00-00-0c-07-ac-25
+ Q' K* o/ R& V( h) k* c* gb. ???
# ]& ^, g  t7 Y& k+ ]/ ?c. ???
d. ???
7 i0 A1 u; M4 [Ans: A
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" ]% A- A6 _6 \! r12. What is the default value for spanning-tree port-priority?
2 W, E% h2 i" w" E, {$ m7 Oa. 128
+ q( r( B+ E) o( O+ |b. ???
c. ???
d. ???
& G* }/ L4 ?/ D3 ~  M* ^9 }# qAns: A
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13. Which information does CDP supply from connected devices?
a. hardware platform, interface ID, hostname
b. ???
c. ???
+ o$ X& K3 u9 o0 J; id. ???
( t2 F: f; P! n; \5 H: d# G% `Ans: A
& |$ f- [$ o. L! d$ c/ j____________________________________________________________
4 A- Q; h8 [0 t0 N6 t14. If EtherChannel guard is configured, how the interface status is (or looks like) if misconfigured?
a. errdisabled
* j8 D& f( u8 C5 V# E" t% lb. shutdown
& O/ O# @3 x' E/ mc. ???
d. ???
- F7 y. g7 J. j3 X' f. h; c) IAns: A
; O' \2 r, U2 M5 F( N____________________________________________________________
15. When you configure PVLAN to the portal facing to the router what kind of ….. should be?
  z; H' a6 b- |: |a. isolated
1 o$ V2 @3 z/ Ab. promiscuous
c. ???
d. ???
$ i$ t5 C+ M% YAns: B
" f- n3 q8 l6 k4 Q. W1 G____________________________________________________________
0 l0 q$ E( J7 p$ N/ Q9 s16. A question with an exhibit.
There are 2 SW and 2 PCs. There is a trunk with VLAN 1 and 5 allowed. Question is if you do “switchport trunk allowed vlan 2,3,4” on SW2, what happens. Ports towards PCs are in mode access VLAN 5.
) b3 C- D. z9 Y& w' B  sa. The connection is lost between PCs, because you will remove VLANs 1 and 5 from trunk with this command. You should use “switchport trunk allowed vlan” to add additional VLANs into trunk.
9 @: g* d) K9 c# Q. yb. ???
3 y& p- d, F- p7 Z3 v0 Z, Wc. ???
/ ^! b1 T9 y, ^$ j+ I) od. ???
8 E0 K) o3 f8 [+ q  L+ ZAns: A
$ b& W% q  x( M! W5 L2 |2 j____________________________________________________________
  N2 S0 \4 n" e2 @0 R17  Which option TPI 802.1Q tag?
a. 0x0806
% S  h& n4 Y! a5 Ub. 0x888E
' r4 }1 L6 q: `: D' Xc. 0x0800
d. 0x8100 **
Ans: D
& Q& a5 ~3 t0 S/ S( A' x1 U____________________________________________________________
5 o( i0 Y2 o/ ?( `18. MAC address filter?
a. CPU-destined
. o' Q7 L/ I! a, Fb. router
5 `, K# M' [. o/ D4 O, Y) O2 A. ]c. unicast **
" N  l  I$ @( F* Q: e  ?- qd. multicast
$ g& ^& `+ t: P) [" c4 H- wAns: C
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1 u! [; r+ u% x  R- }# z" H19. Question about what would be, if write command “switchport mode trunk portfast”? (I don’t remember properly)
9 G4 ^) ?, ?( E( za. trunk port will be immediately
! Y  }5 H( I0 h! r1 r5 D- ?b. trunk port can be portfast mode
c. BDPU turn this port to err-disabled **
d. ???
Ans: C
9 J8 a4 S: G: Z+ N' f$ k) F) e) o____________________________________________________________
20. Question about root guard….
a. Prevent unknown switch be a root port
& }. w- J: K8 H1 s. G" N* v; db. Root-inconsistent **
/ Z* T1 l5 l# w9 H; Pc. ???
& r" O) w  l9 K8 u: q; L% Ud. ???
2 S4 b0 K6 f6 U# O% w* |Ans: B
& B* V- D: d( a6 z/ o! E* _____________________________________________________________
21 Question about Loop guard configure……..
- D) [3 j, Z9 i- H6 s3 na. (config)#spanning-tree loop guard default
b. (config-if)#spanning-tree loop
: a6 Z# H) o* E( x; Q5 Vc. (config)#spanning-tree loop-guard default
d. (config-if)#spanning-tree guard loop **
e. (config-if)#spanning-tree ??????
Ans: D
3 `; Y6 L, a+ G% t; g* Y7 v$ U____________________________________________________________
22. VMPS question – a dynamic access port is member of which VLAN by default?
a. VLAN 1 is the default VLAN **
b. none until the port VLAN is determined
c. ???
8 R4 D' Y6 C" T  B0 p/ n, E- ld. ???
- i" e1 o7 d& p6 J% h( r: L, e2 KAns: A
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% g' T* |( A+ A( p23. Question about the behavior of an access port when a tagged packet is received.
a. packet is dropped.
b. tag is removed and packet is forwarded on the VLAN of the access port. **
c. tag is removed and packet is forwarded to the VLAN mentioned in the tag.
9 \# Q( @( O" ?4 Id. ???
Ans: B
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! `9 \* W& @% j0 H: B24. What is an extension of HSRP that allows load sharing between two or more HSRP groups?
a. ???
+ Q2 [! h4 p7 eb. GHSRP
2 W# K- X- D) P9 T* _c. MHSRP **
d. GLBP
e. ???
! I$ z+ z- R# J3 B* af. ???
! n- o# ]6 n: m: ^: m4 [% m5 i7 jAns: C
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" n9 |; f) `4 Y25  A question about RSPAN.
a. vlan 4029 remote span
b. vlan 510 remote span **
c. vlan 510 span
4 ^5 z* y' ]+ K4 Ed. vlan 4029 span
/ V9 m; Y2 ^7 n' Y6 Y6 }( RAns: B
: }& m- N  v, h' D2 {5 {____________________________________________________________
5 _7 D6 R8 v" C, j: }( ?26. A question about configuring spanning-tree port-priority based on a diagram.
* F8 |* Q' l9 q6 oa. (config)# spanning-tree port-priority 127
9 r, P: e, I, l) cb. (config-if)# spanning-tree port-priority 127 **
c. (config)# spanning-tree port-priority 129
! F" x- q. V% u* od. (config-if)# spanning-tree port-priority 129
Ans: B
; }: w8 I% k+ L- ?____________________________________________________________
27 . A question on EtherChannel misconfiguration.
a. PortFast
b. PAGP
$ ]- M- D4 I( Oc. LACP
/ h/ @5 n/ L9 j- Hd. STP **
Ans: D
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1 t5 `. r: \+ y7 k, r28. A question on local database for consoling to network devices. (Choose two.)
a. Console is a backup authentication method **
b. Console is the only backup authentication method
, P& Q3 a5 a0 ^0 @& j* s0 K% n$ e( Pc. You can set user privileged levels **
d. ???
' r6 J6 Y# J* G- G  M4 SAns: A & C
+ z) d& n- L8 e3 _1 z" @% _1 N% j29. Drag and Drop – STP Timers
. \+ n$ i" A6 }- y) gHello
- P/ f) d0 S2 p3 |) E– 10 seconds
– new BDPU
9 `, s5 Y4 `9 W* b0 }, j. G* IForward
. p( r* n% ?" M" `- K  {' P– 15 seconds
– listening or learning
Hold
+ B1 A, H- O4 u; C  u2 Y– 20 seconds
0 M3 A# u" x0 O3 j5 _# _5 @– time when BDPU expires
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30. Three reasons for err-disable. (Choose three)
a. storm control **
b. security violation **
" w( Q6 [4 n$ _. k# _9 q; l) V. Lc. configuration ports into EtherChannel
1 a$ `  y' B' id. BPDUguard **
e. ???
f. ???
2 H9 Z8 R3 b8 pAns: A,B,D
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5 f/ j/ `& Z2 B) Z/ L& u31. RSPAN what happen after configuration.
a. destination port is unusable for normal use **
# _* U# M. E+ v& P, M8 U4 ?b. traffic in network is doubled
c. ???
! a1 b# Z! `7 o" m0 H" G8 jd. ???
Ans: A
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+ q' T' j# g# u) ?2 \+ o: @( O+ O8 w& z32. A question on local user database for login to network devices. (Choose two.)
a. Local user dbs can be main and also backup authentication method **
' U1 R5 {1 ?) Q2 B; u. Hb. Local user dbs is the only backup authentication method
9 T- `3 I9 p6 M! Jc. You can set user privileged levels **
) y9 O% i, i' i" ~( v# l; `; K9 Xd. Local user dbs is used after 3 unsuccessful logins via RADIUS server
e. ???
& [+ Z; Q' r# o4 }Ans: A,C
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1 k! p  z/ Y. k  D8 C( r+ z33 Which switchport feature will block the packet with unknown MAC address from sending it via port.
6 m9 ?; A) u3 S1 Y* ka. switchport protect
" b( a8 y4 Q* Ob. switchport block unicast **
0 D& O) N3 ?6 K2 Uc. switchport portfast
d. packet with unknown MAC will be dropped
Ans: B
- F7 z& H# y3 h6 Y____________________________________________________________
( H8 S$ ~3 U; ]7 S4 ?5 E5 [. ~34. What are the two ways to configure loop guard?
a. (config)# spanning-tree loopguard default **
7 [6 x  V- ^: }1 k; z( Hb. (config-if)# spanning-tree guard loop **
c. ???
# O5 M, L" m) l  D$ c! K7 h6 n: pd. ???
1 {8 P) B. `. l  Ie. ???
Ans: A,B
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2 D6 s' D, Y9 A! q, X* H* V35. Question about action of DAI with invalid IP-to-MAC. (Choose three)
8 V) {" X3 K- K9 v" C3 _a. Intercept **
b. Drops **
c. Log **
" t, H* v' H$ h$ Rd. ???
. T3 _) E" `9 t/ |7 `e. ???
! b' n9 Q! C1 |+ U5 \8 H) R9 QAns: A,B,C
& j0 W2 U7 R9 h4 I____________________________________________________________
36. Question about what are RADIUS server responses. (Choose three)
5 t" U& Z- [, @! c% w$ ^a. Accept **
b. Reject **
c. Challenge **
d. Get Password
- E  ?/ u( [& g4 [1 B5 }. qe. Cancel
3 A1 f  Y& k% @2 z4 Y0 qf. ???
Ans: A,B,C
$ g5 r6 ]% h% I4 S5 d

" ^; U6 n/ Y8 \- P( i3 I0 D
$ O1 ?# A, W2 [( t
! ?6 R$ [7 z* M9 c. ]/ U37 What happens if a switch with dhcp snooping and ip source guard enabled globally, what does the switch do when it receives a packet with option 82?
) j1 o* B8 {8 |2 \% O: Na. Drop
b. Remove 82 and forward **
' a2 R9 ?+ t- _c. Proxy ARP
: A  \( B9 S; C! t$ w) E: Hd. ???
Ans: B
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38  Option 82 question with two choices. (Choose two.)
; g% {, p+ W: [  k8 o: r5 \a. Layer 2 ingress **
9 ~, F+ X/ S7 I8 e7 l, ?# A- ]b. Layer 3 egress **
c. ???
8 n! \! t/ P9 [9 Y' Ed. ???
Ans: A,B
1 @/ {5 `5 q' N( k" Z____________________________________________________________
5 M* d# x# w' q39 . Drag and Drop – Port Priority/Switch Priority/Path Cost
: H' z; f* c, s3 q  \  M+ I! `+ ?+ YPort Priority
– By default port priority is 128
– Lower port priority most preferred path to root
– Value from 0-240
' M5 D0 q' i4 d8 n+ q2 Q1 b( H& x; Z/ M6 q– Multiple of 16 <—– this was there
Switch Priority
– Lower priority is better to be root bridge
– Multiple of 4069 <—– this was there
– Lower bridge priority is root bridge
5 M: D) i9 s& {; p7 MPath Cost
– Cost depends of link bandwidth <—– this was there
+ R8 N9 C) e. M: v5 U8 a– Lower cost value is better <—– this was there but it can be draged to any of them
+ p! l9 J* L. t6 G( S  Q– If you change the cost on an interface of SW1 then only SW1 will learn the change
– Short range — The range is from 1 to 65536.
$ U/ V2 M8 Y  A' n. x– Long range — The range is from 1 to 200,000,000.
1 D; |/ O+ H- ~6 o____________________________________________________________
40 . Which three functions does Dynamic ARP Inspection perform with invalid IP-to MAC address bindings? (Choose three.)
8 D" Q, E5 C& a$ J; A) x7 Na. deletes
; j/ Z$ g5 I( i1 yb. logs **
0 i0 C1 G  n5 j0 Bc. accepts
d. intercepts **
; i5 v* W* e$ A1 ?6 O; D6 {( Ye. discards **
f. bypasses
7 [: f; a& }- k8 X; K  wAns: B,D,E
9 K8 M( S; X. J) d: s/ x. U# x7 q, H____________________________________________________________
41 . Which three features can be optimized by using SDM templates? (Choose three.)
a. port security
' r, n2 F5 S5 C0 A. Z/ nb. trunk
c. VLAN **
# M+ f; i* n9 ]$ y0 g" F% hd. access **
e. DHCP snooping
2 E; q3 w3 m: h9 C, Df. routing **
3 Y- Q9 @7 k% ~% @2 sAns: C,D,F
5 i% ~7 ^7 t3 x3 e/ ^. E& \% q3 ?____________________________________________________________
42 . If all devices on an EtherChannel are sending traffic to a single MAC address, which two methods of load balancing on the EtherChannel are preferred? (Choose two.)
+ o, H# k# F( I, I' h; R9 T# la. destination-MAC
b. dest-source-MAC
( i% E- W6 j1 a' Q6 T+ `c. destination-IP
d. source-MAC **
e. source-IP **
Ans: D,E
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+ z; X- T5 J' _43  Which command is used to verify trunk native VLANs?
9 Z, t$ s8 v* H! Q/ V  E! p+ Fa. show access ports
7 G, Z+ B) U5 V! Tb. show interfaces trunk **
" J& N/ E0 @& n/ k- Ic. ???
4 ?$ x8 d# j+ Q3 Zd. ???
Ans: B
0 Q& U! u( a. [____________________________________________________________
4 o" L# s$ v  {% u5 H% W44. Question about configuring VLAN 10 root bridge with spanning-tree switch priority. (Choose two.)
. b' A5 i; E3 {a. spanning-tree vlan 10 root primary **
3 J6 W% R. l- R. Sb. spanning-tree vlan 10 priority 4096 **
3 B7 r. ]) N/ dc. ???
d. ???
! H. i5 M9 d: p! ee. ???
( A1 {& C* M2 T* m$ k' J1 y: s6 Qf. ???
$ v8 b7 v; W- ]/ }7 R2 M) gAns: A,B
____________________________________________________________
45. Which information does CDP supply from connected devices? (Choose three.)
a. Hardware Platform **
b. Interface ID **
c. Hostname **
; Q6 W+ S' w( L' V+ j) l' Zd. Config Register
Ans: A,B,C
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) S2 R# M7 ~: D7 l, [
+ g* R6 e  {8 z8 n9 L) g: Y8 H46  Question about voice VLAN.
! _0 e" @5 K8 aa. Disabled by default **
b. Enters on untrusted port
  K) p% e$ n; {+ Bc. Default CoS value of 5 for untagged….. **
4 F8 X4 |8 r+ N4 pd. Needs manual enable of portfast.
9 D. B5 o: Z7 m+ p, {4 a7 D/ RAns: A,C
1 d& n, H" _1 X1 A$ a& m____________________________________________________________
47 . Question about UDLD aggressive. (Choose two.)
- n% Q7 S& o1 pa. UDLD messages are sent every 15 seconds. **
& c' I0 I* a/ _% c+ O+ n( Tb. UDLD tries to reestablish link once before declaring the link down.
c. When unidirectional fail is detected, port state is determined by spanning tree.
d. When unidirectional fail is detected, port is turned to errdisable. **
e. UDLD sends messages four times the message interval by default.
  W: p' n9 K) w3 [5 q) I7 bf. UDLD automatically … message interval based on configured timers.
0 t( {+ ]9 O  k* m- |1 u3 N6 vAns: A,D
0 n% {6 B- Q; P* t, ?) ~0 `____________________________________________________________
  n; I6 D% A) N8 V4 g& D7 H5 `- e48. Diagram is: with 1 core, 2 DSW connected with EtherChannel, 2 ALSW, 2 PCs per ALSW. Per diagram current root for VLAN 10 is DSW2.
: t$ Z" X# J, f- Y5 M: p% @8 ^Question is how to make DSW1 the primary root for VLAN 10. (Choose two.)
a. DSW2: change bridge priority to 61440 (highest). **
b. DSW1: change bridge priority to 4096 (lowest). **
c. DSW1: change port priority but in global configuration mode.
; X. q0 ~. y. G: R% rd. DSW1: change bridge priority but value is 0.
4 G3 y8 @) Y; E' Ye. DSW1: change bridge priority but command is priority root.
Ans: A,B
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8 u" w. B( ~, R# y6 I& ]! R8 X49 . How to configure dynamic ARP inspection on a VLAN?
7 _; }3 r" u6 da. (config-if)# ip arp inspection vlan
b. ???
c. ???
d. ???
* k. ]7 H+ z0 Q! f$ w+ cAns: A
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50. Drag and Drop – Port Priorities
7 d; d: B/ P8 ]! H) e: VPort Cost
– 8 default is being the interface value
– range 1 – 200k (200,000)
$ `2 q+ a4 a3 fSwitch Port Priority
– default value is 128
– multiple of 16
Switch Priority
( \% V8 d  f& I. V– lower the better
; g0 a+ s$ q$ \. D, g" `– multiple of 4096
+ m, l+ }/ V* f- J2 n3 a/ ]2 ^2 L

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96. A question about the priority of a Stackwise switch.
(CONCEPT ONLY)
+ q. W9 L/ l" p' n* ma. Master member is selected based on member’s priority. **
* ?( X; Y; g0 ?' xb. ???
c. ???
d. ???
" V0 P" d0 x* u2 H/ LAns: A

1 l3 V9 }+ u' o' }+ U8 v; x" {97. What is the benefit of UDLD?
( x% q- v# g0 L. V; C. M8 g1 N$ U$ pa. provides backup for fiber
b. help in preventing loops **
c. removes loops
d. determines switch path
Ans: B
% t* e' j  A" l/ L! q____________________________________________________________
2 }" S) ?( A9 J# X- R9 X98. When no spanning-tree bpdu guard enable is configured in f0/7, which is true?
, F  q7 ]0 @- a: Z- J1 U(There’s an exhibit that shows f0/7 receive BPDU.)
3 k3 s8 z: M6 u+ X' h4 f3 L  l) Wa. We have to configure shutdown and no shutdown.
2 g5 \$ }5 w5 {b. Have to use errdisable recovery.
% N1 g3 g$ y) r- x7 j$ R1 yc. ???
d. ???
9 `. i/ T5 s; T7 ^- C, VAns: A
QUESTION 99
EXHIBIT INCLUDED.
An exhibit with spanning-tree. Protocol used was IEEE. (Choose two.)
A. The command spanning-tree mode IEEE was implemented.
B. The spanning-tree mode is IEEE.
2 g$ X  p0 g4 ~+ ?' O% nC. NA
+ H& Y  E" c2 B$ mD. NA
+ }4 a. N% U; \- hCorrect Answer: AB
  Z. U* I1 i( x8 ~7 r& W$ l+ aSection: (none)
Explanation
8 l: X7 r  m  x, ~Explanation/Reference:
QUESTION 100
A question about the priority of a Stackwise switch.
8 i# C- m0 H& A& P(CONCEPT ONLY)
A. Master member is selected based on member's priority
B. na
" d6 E3 k) f) W5 \. IC. na
D. na
Correct Answer: A
) j7 ]1 ?% A3 Y7 l5 E* XSection: (none)
& J" v: f) [" Q% s, uExplanation
Explanation/Reference:
QUESTION 101
! |' k* t( x% pA question about port number and multicast address of HSRP.
5 l0 \- p- L" _% Z1 E, i' `! \(CONCEPT ONLY)
' d" }- n+ e# a( v& uA. HSRP uses multicast address 224.0.0.2 and uses UDP port 1985
8 W+ Y) V" q% P; f0 k& L( I4 w6 SB. na
C. na
+ W' |- w) ]- v1 dD. na
Correct Answer: A
Section: (none)
Explanation
Explanation/Reference:
QUESTION 102
5 n0 l) C! h/ d* J) BA question about the port number and multicast address of VRRP.
5 V2 e' E' z% c. T' t(CONCEPT ONLY)
A. VRRP uses multicast address 224.0.0.18 and uses UDP port 112.
/ w: m5 N1 y9 v4 o" L* CB. na
! U% F. `) f0 @+ XC. na
9 q2 k1 c! h4 {# D( h/ x0 cD. na
Correct Answer: A
9 k, Y" }4 E2 g1 {$ E( pSection: (none)
Explanation
Explanation/Reference:
" }5 ~' n* a+ ^) AQUESTION 103
* q7 Z( ^7 Z  h: s/ bA question about the number of Active Virtual Gateways (AVG) that can be used.
(CONCEPT ONLY)
* e% M6 x4 a4 H# A  I' bA. 1 - only one can be elected on a switch.
B. na
C. na
D. na
* e) u2 m' d8 r) W% l4 F8 ~Correct Answer: A
Section: (none)
9 |  a6 H  F8 }/ r# K# Q2 w- e5 E9 UExplanation
. |& w6 @" V/ W; r; w- f* AExplanation/Reference:
% x" y% |6 @( f: u$ g% X" W! _% UQUESTION 104
A question about the port number and multicast address of GLBP.
* x, ?( w: @$ X% P) V(CONCEPT ONLY)
( A5 P9 y. O* ^A. GLBP uses multicast address 224.0.0.102 with UDP port 3222.
1 Q2 U) r4 F5 s* j9 iB. na
C. na
2 m$ }2 i3 U  L$ A( Z; ~& w1 AD. na
Correct Answer: A
/ W6 W4 N- w7 P+ v* H, D) d2 \Section: (none)
2 D# g% q: }; j" w' p/ T5 ^Explanation
$ V5 s7 N* s' x  H& vExplanation/Reference:
QUESTION 105
Behavior of an access port when a tagged packet is received other than the
access VLAN value.
% N# W" a7 k8 z. O" W- y$ @A. Tag is removed and packet is forwarded of the VLAN mentioned in the
' `- i5 ]: C/ |1 L& C- Gtag.
B. tag is removed and packet is forwarded on the VLAN of the access port
8 n9 E" F( h; V0 [& t- F' W( FC. Not Available
- `6 n/ }, I" E: W% ?) X' m) xD. packet is dropped
Correct Answer: D
$ i1 G% ]6 v+ M. {1 h" ISection: (none)
; y( K+ {8 n) o8 u  {3 H3 GExplanation
$ c. C& }5 Z, T" F5 M. z, yExplanation/Reference:
Answer: D
QUESTION 106
/ d9 C+ K: g1 l2 l: y7 L5 g- l+ FRefer to the exhibit
' {* ?1 S0 K( G3 u1 y
A network engineer deployed an older switch with the same spanning-tree
0 ^' P- o+ O6 f- H; |1 ^) M8 epriority as the existing root, which caused a network outage. In which two
( U. B/ f. S' ~7 U4 m, k: `locations should the Spanning Tree protocol root guard feature be
# B/ t, p* S2 R; M2 R8 G% ^implemented? (Choose two.)
) d2 T; |; u1 e- x: }$ \A. On the designated root switch downlinks to the access layer.
B. On all of non-root switch facing ports of the access layer
1 r3 }, F8 w! w# J" w2 `/ mC. On the access layers root facing ports
D. On Layer 3 boundaries in the distribution layer
E. Globally on all network switches.
Correct Answer: AB
Section: (none)
Explanation
( u: r' Z1 Z# N2 FExplanation/Reference:
( O: D- ~* D0 ^: }9 l# tAns: A,B
QUESTION 107
A question about UDLD.
udld setting
udld setting
8 O4 _* C* t% |& P) E2 |int f0/5
udld setting aggressive
1 i- p$ d' `% [- TWhat happens if interface f0/5 has been damaged?
A. Other interface will recover.
# _0 h2 p/ N; y( P3 eB. All links go down
! c& o3 S, D# G+ E& U3 D& ?. ^C. link stays up
/ N+ b) J; @+ `) s% MD. NA
Correct Answer: A
Section: (none)
2 R( j$ s, J* k, c: HExplanation
+ S3 d4 y0 V; DExplanation/Reference:
Ans A
( o* f0 f7 r# z% i3 L$ ^QUESTION 108
Question about the difference between RSPAN and SPAN.
# c! A& G/ T; U* GA. Monitor port
B. access port
C. forwarding Port
D. destination port
+ `( @, V. Z- pCorrect Answer: A
: u- ?4 l& d. m! b! ~) aSection: (none)
+ i6 d2 r- ^6 a" T2 eExplanation
Explanation/Reference:
Ans: A
; X" F; S# ~( RQUESTION 109
% j( F+ v  @( g' i4 a. U1 W" J2 E: H& ^Which option is the maximum frame size for an 802.1Q frame
! y2 F: M. n* NA. 64 bytes
0 C5 l- h' O( R( [  S7 o, }3 H: [7 iB. 68 bytes
* Q* F/ y9 h5 K7 q; N' IC. 1518 bytes
1 Y% Z6 z6 _: v# s: mD. 1522 bytes
Correct Answer: D
2 W6 m; w5 c: ?) Q4 ^$ D9 Y9 e  _5 BSection: (none)
Explanation
Explanation/Reference:
Ans: D
5 w( K* ^! k8 W4 B9 dQUESTION 110
/ y  p) [  l+ g7 I2 {Which option is the minimum frame size for an 802.1Q frame?
8 H5 y% {# J5 l- _A. 64 bytes
B. 68 bytes
C. 1518 bytes
( L# g% O: p( {9 yD. 1522 bytes
Correct Answer: B
1 h, H4 c9 j0 ^% X( p. h+ ?" [" h; sSection: (none)
Explanation
8 a1 ]  E3 x; ?0 Y$ J& n3 ?Explanation/Reference:
4 M" N8 d7 X. C2 Q4 xAns: B
2 r9 i) k1 J, q7 o7 A% Q; [QUESTION 111
What SPAN configuration is required to enable on a switch?
- {# Y' z1 C" l# E5 D: q$ JA. A monitor VLAN is created for the SPAN traffic.
B. Configure a source and destination port
C. Disable VTP pruning on trunk links
D. NA
* o- x7 E% T1 }" }/ C" f8 yCorrect Answer: B
Section: (none)
Explanation
Explanation/Reference:
Ans: B
QUESTION 112
Refer to the exhibit.
: F9 a* R( K; M( _: D(Picture was showing from CLI “show spanning-tree vlan xx” that running on mode
rapid-pvst).
If you have a new switch (that runs spanning-tree mode pvst+) connect to the exist
/ X+ [5 k2 d* [( n6 O" A( I, Cswitch, which statement is true?
A. It will not working between two switches
3 p+ I- r: f) ?% ]$ m3 \9 g7 Q, pB. It will work, the new switch will communicate exist switch with PVST+
C. It will work, the new switch will communicate exist switch with Rapid-PVST
D. NA
Correct Answer: B
Section: (none)
- O% [* P- a3 \; HExplanation
Explanation/Reference:
: X- s& w& X% ~Ans: B
QUESTION 113
6 t# C7 p/ k% dAbout VRRP configuration. Which statement is true?
' \6 V0 ]) L% c# c* D' F" Z[Question just short like this because in each option will have CLI for config 1
group of VRRP]
: t4 U- \$ c* X, U$ B8 _( hA. Switch-A(config)# interface vlan 1
Switch-A(config-if)# ip address 192.168.1.10 255.255.255.0
Switch-A(config-if)# vrrp 1 ip 192.168.1.1
Switch-A(config-if)# vrrp 1 priority 200
( `, j3 C$ g; J& C* ?3 O6 ~) T1 JB. Switch-A(config)# interface vlan 1
1 e8 F* c# r  P8 w8 [' Y% WSwitch-A(config-if)# ip address 192.168.1.11 255.255.255.0
Switch-A(config-if)# vrrp 2 ip 192.168.1.1
Switch-A(config-if)# vrrp 2 priority 100
C. Switch-A(config)# interface vlan 2
- ^7 I6 }- g9 I+ |Switch-A(config-if)# ip address 192.168.1.10 255.255.255.0
- q( x" h# u1 x6 c. h1 q# CSwitch-A(config-if)# vrrp 1 ip 192.168.1.10
Switch-A(config-if)# vrrp 1 priority 100
D. na
- t; ]( i; Q  e  ~% y7 z7 k: BCorrect Answer: A
$ ^' o% h" Y: r9 T! g, \% N4 |Section: (none)
Explanation
2 A4 q# ?( H, c, H4 `5 F% mExplanation/Reference:
/ Z! n2 W# p9 g. R; S  eQUESTION 114
+ `3 A, u8 d/ X+ H1 UQuestion about voice vlan?
A. Disable by default
B. enter on
5 z2 J; Q+ n- J& s! W1 E( B# _+ Q! O, EC. CoS value of 5
4 V1 }* L5 C- L8 X: TD. Need manually enable
" k+ H( `( }% W5 `& x/ D6 Y' yCorrect Answer: AC
: g6 b; h+ l& k; {  A; lSection: (none)
: C" g+ m0 Z8 f+ q, T* cExplanation
' o3 N7 B) h- N5 I1 vExplanation/Reference:
The Answer should be A and C. The Default CoS value is tagged by 5
QUESTION 115
Your company wants to connect an internal switch to the uplink provider switch.
What method / feature / functions you need to enable to prevent initial / potential
& X/ m0 o7 @! O' b7 Q3 C* Zbroadcast of internal information/topology? (forgot the correct wording)
8 b; k2 Y! {4 C) N  jA. BPDU Filter
B. BPDU Guard
1 Z# ^# g+ W, K1 h: y" T* A3 ]% F& bC. BPDU Loop
D. BPDU bridge
; p, V+ @, @1 O( P6 U# O/ g: E' z. CCorrect Answer: A
Section: (none)
7 }8 S, H, J4 mExplanation
Explanation/Reference:
Ans: A
. O$ S1 e) w5 Y  {$ y, |7 X# o! WQUESTION 116
1 K$ u3 S, Z7 o! S5 b' VEtherChannel question. Which combination are possible? (Question looks
4 T. e7 t) |- N  [incomplete)
A. passive-passive
5 d' |2 }0 Q) v* a) zB. desirable-active
C. passive-auto
% N+ N% p4 i1 h! sD. desirable-desirable
3 v! U% @1 ]; J( n3 p% \" Y' nCorrect Answer: D
Section: (none)
- ~+ @. Q* p6 j  CExplanation
Explanation/Reference:
/ c3 A* {' J" _Ans: D
, h. H1 W5 e7 rQUESTION 117
2 H: f5 ~8 o! fEtherChannel guard. What happens to the port when it’s misconfigured?
A. channel gets disabled
B. Goes into err-disable
6 F: g: b  r9 p% |C. shutdown
! w6 }8 F- h% G  `4 iD. Works normal
. u* t1 |1 y6 }8 E; x4 sCorrect Answer: B
Section: (none)
% a  [* H/ m7 b* X6 [Explanation
Explanation/Reference:
err-disable
QUESTION 118
0 u3 n0 y. |7 Z' Rspanning-tree extend system-id
* z9 ]9 g9 J. z2 f?????
2 S- k8 N+ ^$ ~+ {spanning-tree backbonefast
" l- \+ q+ h4 P* f: RThe question was something like what does the configuration do?
A. It used extended VLAN
B. It used to protect Root switch
$ I1 _+ Q' j+ U3 W# F3 Z3 X" WC. extend system hardware
D. NA
Correct Answer: A
* f0 N6 p/ ^, O- c' ~Section: (none)
Explanation
& L6 \5 c/ U* O+ L" Y: P8 s* R) l* aExplanation/Reference:
8 H# V( R/ S9 ~9 e- MAns: A
1 B. p. }6 Z4 T' T3 l; ?8 ]QUESTION 119
6 b6 k; A* v4 V' NA question about CDP.
A. CDP works on L2
) Q; y* X1 I) n/ l0 ^B. CDP uses TLV to deal with native VLAN
% Z" K/ ?. {8 g! W# IC. CDP works on L1
D. CDP with SNMP
E. CDP sends extended vlan info
Correct Answer: AB
0 `+ Y# w& v# x/ A- ~; G& _Section: (none)
Explanation
$ H  u% d0 j" {8 u9 QExplanation/Reference:
Ans: A,B
  D! B8 [0 h5 |9 N4 j* ?________
QUESTION 120
A question about EtherChannel compatibility modes. (Choose two.)
* F$ A* B0 p& nA. passive-passive
B. active-active
& C( q- E, P* s4 eC. desirable-desirable
D. active-passive
E. active-desirable
Correct Answer: CD
Section: (none)
, Y/ k" Z! m9 X3 WExplanation
Explanation/Reference:
# b! E, R5 z, a; \+ B1 AAns: C,D
+ r2 V: u) _5 ^) p. K- U9 JQUESTION 121
There was an EtherChannel configured and one of the port was used as SPAN
destination. What will be the result?
& X6 t* }4 D8 Q5 H7 sA. the etherchannel will not be operational because the port cannot be used as SPAN
destination
+ J3 D- x# f8 w1 D( IB. etherchannel will discard the port used
+ s, l  Y$ g+ ^; Z0 k; x+ MC. the etherchannel will shutdown
D. NA
Correct Answer: C
' |3 m0 m4 @# W5 f( WSection: (none)
' W" f5 v( W( p! Y+ oExplanation
) n* F3 n) V- A/ C3 j$ O/ }+ [9 bExplanation/Reference:
0 M+ o6 S8 g2 a& j* NAns: C
QUESTION 122
- ~, A% q( ]: kA question about interface gi 0/1 being in errdisable and how do you find the
reason for it being disabled
5 q6 w8 l& H, a4 T' K2 eA. show interfaces g0/1 status
B. show run interface g0/1
C. show ip int brief
D. show log
/ w- W% i* l( w3 B4 L3 BCorrect Answer: A

) k6 ^' K) |2 q' {; `
: s( D* x% N: {. M拖图题汇总：
) m5 J: A; Y% b& _7 ]1.        CDP / LLDP
* k. l, I" b5 W6 @CDP
&#8226;        Default time between protocol frames is 60 seconds
&#8226;        Supports IEEE 802.2 and 802.3 encapsulation
&#8226;        Uses multicast address 0100.0ccc.cccc
5 {) U8 O2 X" ~# ?LLDP
; M- K1 M& h* o; C&#8226;        Default time between protocol frames is 30 seconds
+ N& b6 |* |4 J4 m&#8226;        Sends topology change notification
&#8226;        Uses multicast address 01-80-C2-00-00-0E
==========================================================
2.        BPDU Filter / BPDU Guard / PortFast
BPDU Filter
8 X/ {; _! @8 h! ~9 ?) \, O&#8226;        Disables Spanning Tree on a configured interface
&#8226;        Protects configured interfaces from sending and receiving unauthorised BPDU frames
" P  F+ p/ }& |6 KBPDU Guard
&#8226;        Protects configured interface from receiving unauthorised BPDU frames
&#8226;        Shuts down port and places it in err-disabled mode
, p: O+ [8 r9 h" ?; I' `PortFast
&#8226;        Configured on access ports with a single host device
&#8226;        Configured trunk interface goes immediately to forwarding state from blocking state
' y$ {/ `6 \( d' |* Y==========================================================
% [+ G* N& i8 g0 }3.        MSTP / PVST+ / Rapid-PVST+
MSTP
* d! H% A' A: s$ {. ]&#8226;        Based on 802.1S
&#8226;        Maps VLANs to instances
+ o1 H/ `2 p% k8 p. `6 [PVST+
# \- ~0 ~9 j2 o&#8226;        Based on IEEE 802.1D
&#8226;        Default STP mode
' r8 u( r  c% c# g0 IRapid-PVST+
2 j" |/ T- M6 ~" y+ s* i( q&#8226;        Based on IEEE 802.1W
" n5 t& P' m1 p  I" G" S4 [, g( R&#8226;        Discarding port state
7 p8 o3 S6 {: Z7 C8 r8 o==========================================================
4.        Forward / Hello / Hold
/ B; `7 I: q2 M9 T$ t+ i" GForward
3 [9 f2 G3 G" P. q. t( k&#8226;        15 seconds
&#8226;        Listening or learning
Hello
&#8226;        10 seconds
* ~$ O+ q1 j/ @* C&#8226;        New BPDU
Hold
&#8226;        20 seconds
&#8226;        Time when BPDU expires
( y$ G, N0 [3 ~: x& Q, ~$ j, s* b==========================================================
5.        Port Cost / Switch Port Priority / Switch Priority
- g* h: ?& q) G1 XPort Cost
&#8226;        8 default is being the interface value
&#8226;        Range 1 – 200k (200,000)
. `7 S9 t1 E! u, vSwitch Port Priority
&#8226;        Default value is 128
&#8226;        Multiple of 16
# h2 d1 M! {) X0 W* v3 rSwitch Priority
&#8226;        Lower the better
&#8226;        Multiple of 4096
==========================================================
) z- v# \- |, ]* @3 e7 P5 `& M6.        Guard Loop / Guard Root
: Q# X  M: X  q: x7 |Guard Loop
&#8226;        Detecting unidirectional switching links
&#8226;        Port self-recovery
Guard Root
&#8226;        A better BPDU disables the port as err-disabled
&#8226;        Protect designated port from receiving superior BPDU


& t" g9 R: y2 ^5 h0 k
1 ]5 o& j% x7 }3 L) u4 B$ i
来源: CCNP交换（300-115）考试新题汇总（5月24日更新）

woshiab321

xiexielouzhu

HelloKitty_S

感谢乔帮主，请问能不能搞到描述细致一点的题呀，感觉题目描述有点过于模糊了/(ㄒoㄒ)/~~答案是很详细

1639487618

顶一顶

2han9we1

123

wax0506

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xuguangary

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david75720

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luiszehang

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4 V( x8 E! p8 L# t- g

小丑updating

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suzhou1898

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suzhou1898

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suzhou1898

谢谢谢谢谢谢寻

luiszehang

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zoo94875

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