发信人: sobt(好懒)
整理人: reynolds(2001-11-08 08:48:10), 站内信件
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122. What is a disadvantage of using a connection oriented protocol such as
TCP?
A Packet acknowledgment may 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 correct searchers
of the data packets
Answer: A
123. Which type of LAN segmentation device enables high speed data exchange?
A hub
B bridge
C switch
D repeater
Answer: C
124. What are two ways IPX supports multiple logical networks on an individual
underrate? (Choose two )
A network number
B routing protocol
c encapsulation type
D autonomous system number
Answer: A, C
125. What are characteristics of UDP?
A It is reliable and acknowledged
B It is unreliable and acknowledged
C It is reliable and unacknowledged
D It is unreliable and unacknowledged
Answer: D
126. Given the following IP address from the Class B address range
172 35 21 12
Your network plan requires no more than 126 hosts on a shored that includes
this address When you configure the IP address in Cisco IOS software which
value should you use as the shored mask?
A 255 255 0 0
B 255 255 128 0
C 255 255 126 0
D 255 255 255 128
E 255 255 255 252
Answer: D
127. At which layer of the OSI model does the ping command operate?
A session
B network
C transport
D maintenance
Answer: B
128. Which command displays the IP addresses assigned to specific host names?
A show hosts
B show interface
C ping host name
D config host name
E show host mapping
F show host ip address
G trace ip. addresses host name
Answer: A
129. What is the connection oriented protocol in the TCP/ IP protocol stack?
A IP
B UDP
C TCP
D DNS
E OSPF
Answer: C
130. Which two statements accurately define IP addressing rules? (Choose two )
A IP multicast addresses start with 240
B A host portion of all 1 a indicates a network broadcast
c The value of zero (0) in the host Carbon means all hosts on the network
D IP addresses are four octets long and contain a network portion and
a host portion
Answer: B, D
131. Which encapsulation type should be used for the E1 port of Router R3?
A SAP
B HDLC
C APPA
D Novell- Ether
Answer: D
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