2014年思科认证考试：(Cisco)CCNA仿真试题5
为了帮助广大考生系统全面的复习好《思科认证：CCNA认证学科》，我们考吧网整理了思科认证模拟试题，本次汇编的模拟试题希望对你的考试有所帮助，预祝你考试顺利。
1. What is considered Layer 3 addressing?
A. Data Link Layer
B. Network Layer
C. Application Layer
D. None of these
Answer B. Physical is Layer 1, then data link, and then Network. This is the samelayer that routers are on.
2. Which of the following are considered routing protocols?
A. OSPF
B. IP
C. IPX
D. EIGRP
E. Token Ring
Answer A D. Answers B and C are routed protocols, whereas A and D are the protocols
that do the routing. This is easily confused. You can remember it by thinking that
the routing protocols that haul the routed protocols are like a tug ship pulling a
barge. The barge is full of data.
3 What layer are Bridges on?
A. Data Link
B. Physical
C. Application
D. Transport
Answer A. Bridges segment networks but are not able to determine addresses like the
network layer does.
4 Repeaters are on what layer?
A. Transport
B. Session
C. Physical
D. Application
Answer C. All repeaters can do is boost a signal. An active hub is a good example
of a repeater. A switching hub is a good example of layer 3 addressing, since
switches go by network addresses and IPX addresses rather than just boost signals.
Bridges can only read mac addresses, and not the full IPX or TCPIP addresses.
5 Which two of the following are considered connection oriented communication?
A. Setup and maintenance procedures are performed to ensure message delievery
B. A physical circuit exists between two communicating devices
C. It is a best effort type of communication
D. A virtual connection exists between the two
Answer A D. B is not a necessity, and C is not accurate. TCP is connection oriented
and UDP is not.
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