CCNA真题(1)TCP/IP：地址和协议(3)

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26: you are given an ip network of 192.168.5.0 and told that you need to separate this network into subnetworks that can support a maximum of 16 hosts per subnet. this will help alleviate congestion on the network. what subnet mask can you use to create the subnets necessary to meet the given criteria?
a. 255.0.0.0
b. 255.255.0.0
c. 255.255.255.0
, H; L* H6 [$ k/ V) Od. 255.255.255.224
e. 255.255.255.240
$ `9 T* {7 `1 z3 h2 t4 \
. f( A; Q8 o& _* F6 I2 A3 H. ?* ]27: which of the following would a class a network be assigned to?
a. government agency
b. small-to-medium sized corporation
4 P' \6 |( i0 i. [  k' N. ^! qc. soho
d. an individual

28: a client has the ip address 192.168.5.98/27. which of the following addresses are on the same subnet as this host? (choose two.)
* I6 l& {! V) ^" p' S& A, k7 @# Qa. 192.168.5.95
b. 192.168.5.100
! S3 x6 I: t+ ~5 n! @c. 192.168.5.128
! \; e" [) S' a: Bd. 192.168.5.110

29: which of the following ip addresses is not a public ip address that can be routed over the internet?
# }; A' ?0 g; G$ [. O  w4 q2 J2 Wa. 2.3.4.5
" P- |/ J& r8 P3 R# @b. 11.12.13.14
c. 165.23.224.2
d. 172.31.45.34
e. 203.33.45.22

0 x1 y+ H1 S9 K# I" d30: you are given a class b network. what is the default subnet mask assigned to the class b network?
! f, V6 o. y% _5 S: k9 ?a. 255.255.255.255
9 d' V/ @' \! X9 H9 ~7 ~7 N! Ob. 255.255.0.0
c. 255.224.0.0
d. 0.0.0.0

31: you are troubleshooting your router's interfaces. for some reason, the ethernet interface will not accept the ip address of 192.168.5.95/27 that you've assigned. which of the following explains the router's refusal to take the ip address?
a. class c addresses cannot be assigned to ethernet interfaces.
0 y4 W. P7 U( jb. the /27 is an invalid mask.
c. it is a broadcast address.
1 n, T& \. W$ V/ Y0 ~9 xd. it is a public ip address.
  g5 t9 L9 _" de. it is a private ip address.
8 E2 V5 R" G4 l$ U
* Q$ M* d! m' v- ^: u, |+ d" G; D32: you are a network technician at acme, inc. you are required to divide the 172.12.0.0 network into subnets. each subnet must have the capacity of 458 ip addresses. also, according to the requirements, you must provide the maximum number of subnets. which subnet mask should you use?
a. 255.255.255.254
: Y5 M' F/ b( J5 F; o( B4 Db. 255.255.254.0
c. 255.255.240.254
d. 255.255.0.0
# M6 v7 |1 ~& M2 q# O$ E
33: what is the subnetwork and broadcast ip address of 192.168.2.37 with the subnet mask of 255.255.255.248?
a. 192.168.2.24/192.168.2.31
5 C- w: I5 q! Q9 t, G7 U5 Qb. 192.168.2.32/192.168.2.39
+ M8 ]( z# C0 K) r; ^+ jc. 192.168.2.40/192.168.2.47
7 l, b# w/ z- k" w( Gd. 192.168.2.48/192.168.2.55
- h& K5 a9 \/ P) ae. 192.168.2.56/192.168.2.63
- d' X: c8 N  I  h! F# C8 F$ q. C! O
34: one of your co-workers at acme, inc., needs to convert the binary number 11011010 into a decimal. what is the decimal equivalent?
a. 218
b. 219
/ t$ @2 M; t! g* X2 C9 Vc. 220
d. 221
  I& ~1 J9 ]; f, D" J+ ie. 222

35: one of your co-workers at acme, inc., needs to convert the binary number 01011010 into a decimal. what is the decimal equivalent?
a. 75
b. 83
7 }! C  |" W; @3 H" q% ec. 90
d. 97

36: one of your co-workers at acme, inc., needs to convert the binary number 11010110 into a decimal. what is the decimal equivalent?
a. 198
9 F6 v% B$ B/ R0 W/ ?b. 214
8 A4 f" q4 c+ N- b/ g% Pc. 252
9 l& W. u" @) |( N$ id. 255

37: one of your co-workers at acme, inc., needs to convert the binary number 10110110 into a decimal. what is the decimal equivalent?
( f/ x, t7 {! w9 `' va. 182
4 M- C6 y$ Y+ S1 P, Kb. 192
c. 202
* ]4 \: O/ L$ ?' B  W: z' x9 t$ ?- q% w1 Cd. 212

. a# F+ L7 ]* M38: you are configuring a subnet for the acme, inc., branch office in beijing. you need to assign ip addresses to hosts in this subnet. you have been given the subnet mask of 255.255.255.224. which of these ip addresses would be valid? (choose three.)
* L- t1 @1 M  \) ^8 Da. 15.234.118.63
- }* s7 y7 K# l; w' E/ Rb. 92.11.178.93
! Q$ j3 Y) `% K6 ec. 134.178.18.56
- C* G: a/ F* g% u' w! Ed. 192.168.16.87
- T7 u9 ~& q# o3 {  }5 z( ~e. 201.45.116.159
9 i! c% k' K$ o4 x1 _f. 217.63.12.192

" k2 H: z" A5 z1 l39: you are a network technician at acme, inc. you have subnetted the 208.98.112.0 network with a /28 mask. your boss asks you how many usable subnetworks and usable host addresses per subnet this will provide. what should you tell her, assuming your router is using ip subnet-zero?
) s) f" `$ N/ H; U) h. Ya. 62 networks and 2 hosts
9 P/ d7 O5 V8 s) }5 q  S" D2 F! Mb. 6 networks and 30 hosts
9 I& t' Q/ C( Dc. 8 networks and 32 hosts
d. 16 networks and 16 hosts
e. 16 networks and 14 hosts
2 N' w  M% M' p- l% I. T40: what is a disadvantage of using a connection-oriented protocol such as tcp?
a. packet acknowledgment might add overhead.
b. packets are not tagged with sequence numbers.
c. loss or duplication of data packets is more likely to occur.
d. the application layer must assume responsibility for the correct sequencing of the data packets.