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思科认证考试（ＣＣＮＡ）考试模拟题７２—７８及答案(1) |
| 来源:www.stu88.com 时间:2006-04-01 |
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Questions
72. [xINx] The size of a window in a TCP segment establishes what? (Choose one.)
a) The maximum number of bytes that a single frame may not exceed
b) The allowable bandwidth for this TCP session
c) The number of octets that the receiver must be willing to accept
d) The number of 32-bit words in the header
e) The number of octets that the sender is willing to accept
73. [xINx] Which protocols are best described as connection-oriented and reliable? (Choose two.)
a) UDP
b) IP
c) TCP
d) IPX
e) TCP over IP
f) UDP over IP
74. [xINx] A Telnet session to a remote host would be addressed to what port number at the remote host? (Choose one.)
a) UDP port 53
b) TCP port 53
c) UDP port 21
d) TCP port 21
e) UDP port 161
f) TCP port 23
75. [xINx] TCP "source" port number(s): (Choose the one that best describes.)
a) Depends on the application being accessed on the destination host.
b) Depends on the application running on the source host.
c) Are usually assigned by the source host, and are typically some number greater than 1023.
d) Are assigned by the source host and are usually one of the "well known" port numbers.
e) Must be negotiated by the sender and receiver during session setup.
76. [xINx] In a TCP acknowledgment, the ack number refers to: (Choose one.)
a) A sequential number beginning with 1, and incremented by 1 with each exchange, that identifies this exchange of packets as being complete
b) The number of the packet expected next
c) The number of the packet expected next, plus 1
d) A number agreed upon at session establishment, which will be used by the receiver to indicate a successful exchange of packets
e) TCP does not use acknowledgments.
Reference the diagram and configurations below for Questions 77 and 78:
Router_C#sh run
Building configuration...
Current configuration:
!
version 11.2
!
hostname Router_C
!
!
appletalk routing
ipx routing 0060.09c3.df60
!
interface Ethernet0
ip address 172.16.1.1 255.255.255.0
appletalk cable-range 100-105 103.243
appletalk zone right
ipx network DAD
!
interface Ethernet1
no ip address
shutdown
!
interface Serial0
ip unnumbered Ethernet0
appletalk cable-range 120-120 120.17
appletalk zone left
ipx network AD
clockrate 56000
!
interface Serial1
no ip address
shutdown
!
router igrp 100
network 172.16.0.0
!
no ip classless
!!
line con 0
line aux 0
line vty 0 4
login
!
end
Router_B#sh run
Building configuration...
Current configuration:
!
version 11.3
no service password-encryption
!
hostname Router_B
!
!
appletalk routing
ipx routing 0007.7816.fe54
!
interface Loopback0
ip address 172.17.1.1 255.255.255.0
!
interface Serial0
ip unnumbered Loopback0
no ip mroute-cache
appletalk cable-range 130-130 130.81
appletalk zone right
ipx network CAD
no fair-queue
!
interface Serial1
ip unnumbered Loopback0
appletalk cable-range 120-120 120.125
appletalk zone left
ipx network AD
!
interface Serial2
no ip address
shutdown
!
interface Serial3
no ip address
shutdown
!
interface TokenRing0
no ip address
shutdown
!
interface BRI0
no ip address
shutdown
!
router igrp 100
network 172.17.0.0
!
ip classless
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
login
!
end
Router_A#sh run
Building configuration...
Current configuration:
!
version 11.3
no service password-encryption
!
hostname Router_A
!
!
appletalk routing
ipx routing 0010.7b15.bd41
!
interface Ethernet0/0
ip address 10.1.1.1 255.255.255.0
appletalk cable-range 106-110 106.17
appletalk zone left
ipx network BAD
!
interface Serial0/0
ip unnumbered Ethernet0/0
no ip mroute-cache
appletalk cable-range 130-130 130.37
appletalk zone right
ipx network CAD
clockrate 56000
!
interface TokenRing0/0
no ip address 共4页: 1 [2] [3] [4] 
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