- 积分
- 125
- 鸿鹄币
- 个
- 好评度
- 点
- 精华
- 最后登录
- 1970-1-1
- 阅读权限
- 20
- 听众
- 收听
助理工程师
 
|
发表于 2018-5-25 21:15:20
|
显示全部楼层
. u7 B% J1 k: B! ]3 M& C& n9 q
請問題目是像這樣嗎?
; T/ M) a& N P
1 P& h& s- R& x6 k8 S% G5 QQUESTION 1
: r* W* ]8 Y" g! A; w# ]The following commands are issued on a Cisco Router:
( N. @# e" L2 {: e6 X$ S: ^4 ~7 |Router(configuration)#access-list 199 permit tcp host 10.1.1.1 host
2 J3 u" `# ` }172.16.1.1
! H6 D) I+ q. @+ k! ~Router(configuration)#access-list 199 permit tcp host 172.16.1.1 host
3 L3 g7 x2 [$ e' W V4 o3 r10.1.1.1
5 G9 U. b$ W9 RRouter(configuration)#exit
7 q- x( a. D" J" h" rRouter#debug ip packet 199
: }. K& d2 K. k4 \6 b* P. m5 _. {/ ~What will the debug output on the console show?
. z' `; {1 C& DA. All IP packets passing through the router & m/ g0 G4 J8 H9 W
B. Only IP packets with the source address of 10.1. 1.1
) f( ]0 h3 u. p1 X8 HC. All IP packets from 10.1.1.1 to 172.16.1.1
; j; ]: Y" D$ e, DD. All IP Packets between 10.1.1.1 and 172.16.1.1 , d$ \) X5 w- |2 [" _
Answer: D 2 q3 n' t0 k- }" i& B( t
8 J+ K% G/ l% t" T7 Y
Explanation:# s/ K E [/ w2 p5 u' o8 Z* m
In this example, the "debug ip packet" command is tied to access list 199, specifying which IP 4 O2 I. x2 i4 n
packets should be debugged. Access list 199 contains two lines, one going from the host with IP - t4 _0 r; P6 y0 N6 t; l
address 10.1.1.1 to 172.16.1.1 and the other specifying all TCP packets from host 172.16.1.1 to
2 B, [4 d" z# {: U' \10.1.1.1. 0 [% p4 z: I$ l, n
" J1 L, R! M- ?QUESTION 2 - E# ~8 J9 D A
What level of logging is enabled on a Router where the following logs are seen? %LINK-3-
: \5 a) q, @+ X. }+ tUPDOWN:
- I! d% E2 L" {* @# DInterface FastEthernet0/1, changed state to up % LINEPROTO-5-UPDOWN:
/ M$ t" L* {- DLine protocol on Interface FastEthernet0/1, changed state to up & p( I& @# l' Q2 B6 Y1 o9 j6 Y
A. alerts 9 L/ ^! t9 {& L! r8 J
B. critical 9 O o. ], X$ O% P
C. errors
, O' [2 c: Q( D" M WD. notifications 7 r' _5 c, g2 \* @* j/ e! N4 C
Answer: D
/ X. B( Z) k' y5 |0 K! m
9 v! G" B2 s+ W- oExplanation:
7 ~$ z8 A4 M9 xCisco routers, switches, PIX and ASA firewalls prioritize log messages into 8 levels (0-7), as . d$ k8 x& X: U
shown below: 7 V/ u( t: Y' L+ G) Q
LevelLevel NameDescription % l& C5 {: j6 V
0 Emergencies System is unusable ! C& H% C# D- B/ {/ ?$ n, n
1 Alerts Immediate action needed / g5 ?3 [* U& T6 b, S1 Q
2 Critical Critical conditions 5 q: c. V; r: d- j2 P: E
3 Errors Error conditions
: z# I0 A" W, F k2 h4 Warnings Warning conditions
' E; V+ }0 [# a1 V# O+ O5 Notifications Informational messages
! j; L( K R5 `! P+ X6 Informational Normal but significant conditions / ?7 X& E- s: M4 X! R y2 ]
7 Debugging Debugging messages . U8 \2 v, c2 G- W
When you enable logging for a specific level, all logs of that severity and greater (numerically
, Q+ S, i. s2 C4 k2 nless) will be logged. In this case we can see that logging level of 3 (as seen by the 3 in "LINK-3-
( y7 @* H5 f0 d, S! N, K/ T% H% cUPDOWN") and level 5 (as seen by the 5 in "LINEPROTO-5-UPDOWN") are shown, which
* \ j& g2 q2 K- [means that logging level 5 must have been configured. As shown by the table, logging level 5 is
. L, { n; G/ q) x3 H) a- A1 }9 ^. @
QUESTION 3
4 f7 V( ]+ c- N9 J1 wYou have the followings commands on your Cisco Router: 6 o, Y: }3 N1 n7 @) C7 D A* R
ip ftp username admin : h# ~; V& R6 C5 m* U5 t! ]
ip ftp password backup
+ ?, w6 a3 h* o2 C% s' p& ~You have been asked to switch from FTP to HTTP. Which two commands will you use to replace
; y6 r$ ]4 _; G# S8 G0 X+ nthe existing commands? 9 I3 \" K1 i% e; g2 W/ S
A. ip http username admin , b" x; N- |, o9 Z4 d
B. ip http client username admin 4 X2 G! O& g: u( h, Q3 u3 H" R7 w
C. ip http password backup ( F2 E% K9 M t8 B3 l* \7 U
D. ip http client password backup
5 I2 X" d3 B6 r* v9 gE. ip http server username admin
. C0 N3 g$ Q6 V% |% N4 }F. ip http server password backup 9 n4 }" [2 v, B6 x( x5 Y
Answer: BD
Q* g! I0 W8 X3 S5 ?/ k0 }( ?2 f* @/ I/ k! q* k1 f1 Q/ d: M
Explanation:
3 x) t( W# ^- \$ s- L2 q2 c& ZConfiguring the HTTP Client
8 i7 e% C4 R7 s# B( m( q* z- RPerform this task to enable the HTTP client and configure optional client characteristics. The % \8 M! h2 T1 E2 C4 R
standard HTTP 1.1 client and the secure HTTP client are always enabled. No commands exist to 4 d# J+ X; ^4 r9 e& I
disable the HTTP client. For information about configuring optional characteristics for the HTTPS
% `, T1 a' j" C1 Rclient, see the HTTPS-HTTP Server and Client with SSL 3.0, Release 12.2(15)T, feature module. |
25#
2018-5-25 21:15:20
回复(0)
收起回复
|