26) which statement is true of tli (下面关于t l i的哪一句陈述是正确的)？
+ l& D1 A* J) X+ ^- E7 M! X1 z a. it is a layer in the osi model & G, ]3 N. \2 [& t
b. it is a layer in the tcp/ip model
8 o; U& n1 `: N5 R I- n c. it is a system v api
5 \' l; [7 N( v1 c% D; L( `2 D) A& C d. it is part of the unix kernel
: ~4 a2 c9 F5 V9 S! k7 E 27) which statement is true of windows name server (wins) (下面对于windows 命名服务器( w i n s )的陈述中，哪一句是正确的)？ * T8 A7 P* k- p2 }
a. it is a protocol 0 w/ y" ]" `. G# h8 _2 |
b. it provides capability for name resolution
* l( @9 V) z! B5 g- `5 H5 h6 z# y c. it is a network layer
- u' \/ e3 f' y' r5 y; K. @6 T d. it is a proprietary name server
. I, p2 F2 c q. c, y0 W s e. a, b, and d only
! V( b& S* d! b# M- {1 i f. b and d only HF=}m@7veLWqR'tHRx[本_文_来_源_于_我_的_学_习_网IT认证思科认证 http://Www.GZU521.Com ] HF=}m@7veLWqR'tHRx" R% c$ {; |0 r
28) icmp、i p、arp and rarp of the ip protocol suite map to (ip协议套件的i c m p、i p、a r p和r a r p映射到)： $ V3 k, l" n- Q' L$ `8 |
a. osi layers 1 and 2 % a h$ p( O6 ^* {* q6 c$ u! T
b. osi layer 5 1 P& w- r# s; R& ~: J' I' T0 e
c. osi layer 3
0 x5 P W* ]1 W* o d. osi layer 2
: S& E8 Q L2 |( \$ w 29) which layer is most important in providing reliable data exchange between two systems
# X& {0 N3 i# h1 r4 K(在两个系统之间提供可靠的数据交换中，哪一层是最重要的)？ . X3 n$ Q2 O% S5 b2 J
a. physical layer ) ^5 }: X8 l5 ?9 ?
b. data link layer
- a) }: P8 o) k6 `0 h, y) e0 e! L c. session layer
# G5 ?- _! D- j/ H d. transport layer 5 \- W; t/ n- c
30) which of the following does tcp provide (tcp提供了下面的哪一个功能)？
/ Y! n9 }6 ~' J/ m, T. M: S a. unreliable data stream ( F, o7 m r" [4 u2 I" s
b. connectionless virtual circuit + w/ ]8 _9 z0 F
c. flow control $ W' @8 B* ~4 d t
d. structured byte stream movement # ]) C! X6 {0 }
31) of the following, which field is not a part of the tcp header (在下面各项中，哪一个字
- X/ Z7 q' f" {4 u' V段不是t c p报头的一部分)？
. \# P) |! e5 V4 D7 o6 o6 s* [ V0 Y a. subnet mask 4 ~* u4 r4 x5 v. I$ u0 ^" o
b. sequence number - [3 Z: d! M8 o, Q) h4 ]! ?
c. data offset - K8 U- p8 g* C" c+ A( L
d. destination port 2 \! _( S8 M; A! G4 X
32) what is the sequence number in a tcp header used for (在t c p报头中的顺序号的作用 4 r9 c) ]) r! \0 u. K$ a( \1 g2 A
是什么)？ 3 H& F) _- q& V' h
a. acknowledgments
& d1 b3 S* T2 Y- u2 O! v Y, | b. reordering of the octets received
- O+ |8 Q+ {/ W" _: V7 ~& V c. rejecting duplicate octets
. p* K/ \8 K5 p9 H$ L 33) variable sliding windows provide an explicit mechanism for notifying tcp if an intermediate node (for example, a router) BEComes congested (在中间节点，例如一个路由器拥 : m; I. U- b! k$ f' ~1 z, a
塞的情况下，可变滑动窗口提供了通知t c p的显式机制)。
9 i) N: q- h5 F4 Z4 } a. true
# i- q* \9 g, a0 C+ j9 D b. false
- n H2 R- O9 b$ X 34) which of the following parameters is not a part of udp header (下面的哪一个参数不是u d p报头的一部分)？ , g0 B8 Z, s5 u& L/ @% D5 k7 a
a. source port
( Y2 J* H5 X$ y# m) G$ { g b. urgent pointer % t; o# B. v% [: K4 {
c. checksum
2 d" g7 O' g) R: c5 e# O; l d. length 4 a7 w4 t+ F* j% T, t/ `
e. destination port 1 c9 D/ D0 x p
35) when a router has been configured for udp flooding, the source address might change,but the destination address will not change as the datagram propagates through the network (当一个路由器已经配置为u d p泛洪时，当数据报在网络上传播的过程中，源地址可能改变，但是目的地址不会改变)？
- v" H) P8 c1 X! d6 E0 _ a. true
1 W3 ]5 b; s0 k+ M6 I b. false
& [5 s7 f# g+ L本文来自学习网(www.gzu521.com)，原文地址：http://www.gzu521.com/campus/article/it/200603/14492.htm |
发表于 2012-8-3 19:18:10
