4-7 东莞896低分通过

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    一上来就是一道新题，是关于IPv4的，不过还好，有点基础的都能做对。期间一共4道新题，复习4.7题库稳过。其实做题的时候我觉得自己是970的。。。因为真的跟题库一模一样，可能我实验题没做好吧。    说回实验题，抽到的是ACL3和OSPF。ACL题目和题库有点出入，主要是最后一条acl条目不同了。抽到的题目已经给出Public server的IP地址。最后一条条目不是access-list 100 permit ip any any而是access-list 100 permit ip any host 172.22.242.18.
OSPF的话和PDF第三页那道是一样的。
    没出拖图题有点可惜，因为我自己很喜欢做拖图题，很稳。如果是刚开始准备的朋友，建议直接用电脑软件来刷题，要比看PDF高效很多，等电脑软件刷得差不多的时候，再把答案顺序打乱的那个选项打开！！！这个一定要打乱答案的顺序，我4月7号下午考，早上才知道有这么一个功能可以打算ABCD的顺序。。。。因为一些题你会自然而然地记住每个选项的位置的，这样很不利于考试，因为考试是打乱的。
打乱顺序的方法是打开软件，到option那里，找到randomize choices where enabled并且勾选上。
; K; }9 q+ F5 ]randomize questions 是打乱题目顺序
6 H  R1 H( \+ j5 [randomize choices where enabled 是打乱选项顺序的


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& D& o' U+ Y4 }# w以下是我记得的题目：
; J& U4 I1 p4 {- [. b7 TQUESTION 24
Refer to the exhibit. The following commands are executed on interface fa0/1 of 2950Switch.
9 j/ ], w% U1 W# w7 A1 c2950Switch(config-if)# switchport port-security
2950Switch(config-if)# switchport port-security mac-address sticky
* u$ S0 t1 H  L4 B7 l8 J2950Switch(config-if)# switchport port-security maximum 1
+ c# [+ i# @+ [" }9 KThe Ethernet frame that is shown arrives on interface fa0/1. What two functions will occur when this frame
is received by 2950Switch? (Choose two.)
# b* \0 x- `, c6 X
9 v( Y, O& D" o) FA. The MAC address table will now have an additional entry of fa0/1 FFFF.FFFF.FFFF.
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B. Only host A will be allowed to transmit frames on fa0/1.
) c9 n- |# V: TC. This frame will be discarded when it is received by 2950Switch.
# v, B6 A. ]; j% \: xD. All frames arriving on 2950Switch with a destination of 0000.00aa.aaaa will be forwarded out fa0/1.
: `9 u1 O7 j7 q3 o% _E. Hosts B and C may forward frames out fa0/1 but frames arriving from other switches will not be
- h9 D5 f* T/ j  m7 j8 ~# Y7 Fforwarded out fa0/1.
F. Only frames from source 0000.00bb.bbbb, the first learned MAC address of 2950Switch, will be
- A. e. v3 _* F+ b7 p) o9 V( q7 \forwarded out fa0/1.
* N8 ]* N9 k, N& h/ }! ZCorrect Answer: BD
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1 \1 f3 _$ l( n7 h+ k+ _9 m' C+ mQUESTION 25
/ }+ i" }0 Z, ]" `0 dWhich command would you configure globally on a Cisco router that would allow you to view directly
6 {: U; N1 R3 u1 ^6 ?4 G5 m" ^connected Cisco devices?
: S# I. p' h1 N9 j+ }+ p8 b2 E5 EA. R(config-if)#cdp run
3 I# r9 o( b4 oB. R(config-if)#cdp enable
C. R(config)#cdp run
+ W8 ~' ]" G: l- Q, B; qD. R(config)#cdp enable
- O6 {. h8 ~$ o3 X2 U$ _4 ACorrect Answer: C
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QUESTION 29
Which two commands can be used to verify a trunk link configurationt status on a given cisco switch?
* j" R$ p4 {, N) U$ w; Z9 \7 {(choose two)
A. show interfaces interface
B. show interfaces trunk
/ q( i( t$ J$ _0 V2 s6 D) t( r% X5 gC. show interfaces switchport
  m0 L+ h& f3 Z! X3 y3 A/ SD. show ip interface brief
9 n$ a6 a1 \* _( W$ p' F9 WE. show interfaces vlan
Correct Answer: BC


2 O" Z) g/ H# v# TQUESTION 30
Which two states are the port states when RSTP has converged?(choose two)
A. blocking
B. learning
" d$ P3 a" U5 G$ x% O( ^5 wC. discarding
0 f) }, z+ |! w% H3 Q% G0 lD. forwarding
3 D1 s5 M3 s7 H+ Y/ W' V5 vE. listening
: Q9 F7 m$ Z2 BCorrect Answer: CD

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QUESTION 36
Which of the following describes the roles of devices in a WAN? (Choose three.)
* w. M2 y( s5 F: K" AA. A CSU/DSU terminates a digital local loop
1 r& l* U9 P/ }! p; fB. A modem terminates a digital local loop
2 x, a$ b0 P! M" QC. A CSU/DSU terminates an analog local loop
D. A modem terminates an analog local loop
" h6 S5 u+ g7 G( h- W" @/ _E. A router is commonly considered a DTE device
F. A router is commonly considered a DCE device
- U! G! }& q* bCorrect Answer: ADE

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, W# o1 S) H# q/ d4 j( {& S! kQUESTION 39
When an interface is configured with PortFast BPDU guard, how does the interface respond when it
8 t, B" t1 m+ {: Y* T' kreceives a BPDU?
A. It continues operating normally.
# h; h- R2 a' PB. It goes into a down/down state.
9 K8 g2 g) e" E  T5 wC. It becomes the root bridge for the configured VLAN.
D. It goes into an errdisable state.
Correct Answer: D
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QUESTION 40
What are three characteristics of the TCP protocol? (Choose three.)
1 {. y  z/ d9 uA. It uses a single SYN-ACK message to establish a connection.
B. The connection is established before data is transmitted.
4 v( ^5 d( ?8 G4 EC. It ensures that all data is transmitted and received by the remote device.
D. It supports significantly higher transmission speeds than UDP.
! N+ L9 t; B' c; O$ RE. It requires applications to determine when data packets must be retransmitted.
F. It uses separate SYN and ACK messages to establish a connection.
) }, m$ L4 ]: U: f" L# CCorrect Answer: BCF
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7 B* u% q6 E9 T! I# AQUESTION 43
5 @1 A9 b5 I! ~6 A* e2 F: AWhat are two benefits of private IPv4 IP addresses? (Choose two.)
' b2 F0 j' [( `9 Y" k; vA. They are routed the same as public IP addresses.
1 B1 ?2 S9 L. z4 m& I% JB. They are less costly than public IP addresses.
$ O7 O0 d1 b. c. q7 J5 ^2 pC. They can be assigned to devices without Internet connections.
D. They eliminate the necessity for NAT policies.
9 K  q# r" X/ G2 mE. They eliminate duplicate IP conflicts.
7 P* H9 u$ L5 K( J8 F; {Correct Answer: BC
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/ K, E& x% _0 oQUESTION 44
- I1 h: H7 O6 J' [* i* LWhat is the authoritative source for an address lookup?
4 o7 {, \% h6 `& c7 x- c- q$ Y% eA. a recursive DNS search
8 n% j1 U' v) z% n7 `B. the operating system cache
C. the ISP local cache
+ P  Z4 ~3 x1 G+ n( DD. the browser cache
3 }0 o. H- e+ ^/ `9 iCorrect Answer: A


" G" W6 u4 n3 j5 n5 XQUESTION 50
Which two statements about northbound and southbound APIs are true? (Choose two.)
A. Only southbound APIs allow program control of the network.
/ a; L0 |7 c  r) o' P0 r- p  b" j7 zB. Only northbound APIs allow program control of the network.
C. Only southbound API interfaces use a Service Abstraction Layer.
1 n; C" D3 `# P# TD. Only northbound API interfaces use a Service Abstraction Layer.
E. Both northbound and southbound API interfaces use a Service Abstraction Layer.
F. Both northbound and southbound APIs allow program control of the network.
. {, K' i, v  f% [% XCorrect Answer: BC

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1 T) o; r- D( S3 EQUESTION 55
; f+ ^' x! U9 ^2 l) d% u; |2 X/ |Which function does IP SLA ICMP ECHO operation perform to assist with
& f9 A+ M: H% d& A& ^troubleshooting
6 ?) a1 n4 _% X0 u1 e# nA. packet-loss detection
  |$ s* K0 G$ ]" C5 w0 eB. congestion detection
4 }9 M, G" k- S- ZC. hop-by-hop response time
D. one way jitter measurement
, g3 u$ o8 W: U2 ?3 p+ E& Y( HE. http://bbs.hh010.com/
# _: A* L: l( |& KCorrect Answer: C
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+ J& x2 W. I3 w& a( a9 _5 HQUESTION 71
' Y% s: k2 G7 H. V0 S+ W# lWhat parameter can be different on ports within an EtherChannel?
7 b! \4 V) g# C) wA. speed
B. DTP negotiation settings
; x- Z- N3 E3 z' M% M  {C. trunk encapsulation
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D. duplex
% o3 J( _  `/ G9 X$ ?  ]% }6 D9 pCorrect Answer: B

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QUESTION 72
0 e: Y2 W" u& b7 l3 g( LWhich two statements about IPv6 router advertisement messages are true? (Choose
two.)
! `, K/ ^8 j5 G/ A2 AA. They use ICMPv6 type 134.
9 O3 y) I% c0 LB. The advertised prefix length must be 64 bits.
C. The advertised prefix length must be 48 bits.
D. They are sourced from the configured IPv6 interface address.
E. Their destination is always the link-local address of the neighboring node.
* W" L4 M1 c4 M* x% ^( G4 mCorrect Answer: AB
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1 H) e5 E- E- j0 O6 M% @, aQUESTION 97
) }% O/ e& Q5 m3 X5 DWhat are two reasons that duplex mismatches can be difficult to diagnose? (Choose two.)
; x& @1 r# S8 [* ^/ l7 u/ @/ gA. The interface displays a connected (up/up) state even when the duplex settings are mismatched.
& m" s! ^4 Q' z6 WB. 1-Gbps interfaces are full-duplex by default.
C. Full-duplex interfaces use CSMA/CD logic, so mismatches may be disguised by collisions.
' A( J: }+ ^5 d" F6 U( |  |D. The symptoms of a duplex mismatch may be intermittent.
E. Autonegotiation is disabled.
Correct Answer: AD
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: {0 N9 z4 Y+ qQUESTION 105
" T2 |% S( R4 b8 ^- S8 D4 `8 RWhich part of the PPPoE server configuration contains the information used to assign an IP address to a
PPPoE client?
A. virtual-template interface
B. DHCP
C. dialer interface
) ]( F( ^* ~$ O! |9 e, bD. AAA authentication
% c0 ~% _. V; v( r3 BCorrect Answer: A



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