CiscoCCNA考试56题(9)

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c the data circuit-terminating equipment (dce) is responsible for providing the clocking on the wire. hint: when you see the ’c’ in ’dce’, think ’clocking’  
; l# m, P4 ~" J4 }+ I33. how do you set the encapsulation type to ppp for an interface? a.) ppp ietf b.) encapsulation ppp c.) ppp enable d.) ppp cisco e.) enable ppp  
b  
. Y) h6 u5 p2 j6 b( X5 }; M; h34 what would the command ’terminal no editing’ do? a.) nothing. b.) turn exec mode off. c.) prevent terminal configuration. d.) turn off enhanced editing. e.) prevents update to ram.  
  _, c  L' a1 [+ [d  
35 how do you view the routers current processor utilization? a.) show cpu b.) show startup-config c.) show version d.) show utilization e.) show running-config f.) show processes cpu  
f router#sh processes cpu cpu utilization for five seconds: 2%/2%; one minute: 1%; five minutes: 0%  
/ g! o+ e% @' N/ U5 k' J! U36 which standard ip access list commands will deny only the source address 1.1.1.1? a.) access-list 9 permit 1.1.1.1 255.255.255.0 b.) access-list 9 permit any c.) access-list 9 deny 1.1.1.1 0.0.0.0 d.) access-list 9 permit 1.1.1.1 0.255.255.255 e.) access-list 9 deny 1.1.1.1 255.255.255.255  
# m; F0 l# I; m1 r4 u9 gc a 0.0.0.0 wildcard mask means check every bit and make sure that it matches. for our example, the ip host address 1.1.1.1 is a specific address to check on the network. an alternative would be to use the ip network address and a special access-list wildcard mask to check an entire subnetwork.  
& @  F" l8 n0 F" @& X& a37 what should be the first command to create an extended access-list that denies host 1.1.1.1 from telnetting anywhere? a.) access-list 10 deny tcp host 1.1.1.1 any eq 20 b.) access-list 10 deny tcp host 1.1.1.1 any eq 22 c.) access-list 10 deny tcp host 1.1.1.1 any eq 23 d.) none of the above are correct. e.) access-list 10 deny tcp host 1.1.1.1 any eq 24 f.) access-list 10 deny tcp host 1.1.1.1 any eq 21  
" K. \" T7 ^8 r/ D+ bd this was a trick question. extended access-lists for tcp/ip must be in the range 100-199. watch those access-list numbers!  
: k3 z' ?( h: g38 there are 2 types of ppp authentication supported by the cisco ios. what are they? (2 answers) a.) stacker b.) chap c.) kermit d.) predictor e.) pap f.) md5  
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39 what type of switching creates variable latency through the switch? a.) multiplexed b.) cut-through c.) layer 4 d.) store and forward e.) inverted  
d definition: latency = delay.because a store and forward switch reads the whole frame before forwarding, a larger frame takes longer than a shorter frame.  
9 O2 |; O/ o4 `8 h% \. v' b  n40. given the global configuration commands: ’banner motd #’ ’hello #’ when would the message be displayed? a.) message of the day banners are not possible. b.) the message of the day banner shows up before login. c.) these commands are not the right syntax for motd. d.) message of the day banners are displayed upon entering global config mode. e.) the message of the day banner shows up during logoff. f.) the message of the day would be, ’hello #’  
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0 _) ?7 [" @5 V, o41 which command enables frame relay on a router’s interface? a.) map wan type=7 b.) encapsulation frame-relay c.) frame-relay enable d.) interface frame-relay e.) cisco encap f.) enable frame-relay  
b  
: n; e/ w; A8 o5 V: Y! T42 which subnet is the host 200.1.1.99 /27 on? a.) 200.1.1.0 b.) 200.1.1.96 c.) 200.1.1.128 d.) 200.1.1.64 e.) 200.1.1.16  
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6 j% s4 v, z2 E9 s6 ub the shorthand notation /27 = 3 bits in the last octet = decimal 255.255.255.224 shortcut: 256 - 224 = 32. valid subnets are multiples of 32 (32,64,96,128, etc). shortcut #2: because it’s a small slice and a big number, who wants to count up every 32 digits to find the next subnetwork address? just divide 99 / 32 = 3 times. now, take 3 x 32 slices = 96, so 99 is on the network 96.