思科认证2022考试题273

1. [单选题]常见的LSA有几种类型()

A. 4
B. 5
C. 6
D. 7

2. [单选题]PPP工作在OSI的哪一层（）

A. 物理层
B. 数据链路层^{(data link layer)}
C. 网络层
D. 传输层

3. [单选题]RIP路由协议认为“网络不可到达”的跳数是：()

A. 8
B. 16
C. 24
D. 100

4. [单选题]路由器“路由模式”的提示符号是（）

B. (config)
C. (config-if)
D. (config-router)

5. [单选题]OSI七层模型中，网络层的数据封装名称为（）

A. 比特
B. 帧
C. 包
D. 段

6. [单选题]路由器上激活端口的命令是（）

A. shutdown
B. no shutdown
C. up
D. noup

7. [多选题]对于IP为199.41.27.0，子网掩码为255.255.255.240，则该IP地址和子网掩码相作用会得到一系列IP，从下列选项中选出属于“有效IP”的选项：()

A. 199.141.27.33
B. 199.141.27.112
C. 199.141.27.119
D. 199.141.27.126
E. 199.141.27.175
F. F.199.141.27.208

8. [单选题]A receiving host has failed to receive all of the segments that it should acknowledge.What can the host do to improve the reliability of this communication session?

A. Start a new session using UDP
B. Obtain a new IP address from the DHCP server
C. Use a different source port for the session
D. Decrease the sequence number
E. Decrease the window size

9. [单选题]The Ezonexam LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?

A. Full-duplex Ethernet uses two wires to send and receive. Half-duplex Ethernet uses one wire to send and receive
B. Full-duplex Ethernet consists of a shared cable segment. Half-duplex Ethernet provides a point-to-point link
C. Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
D. Full-duplex Ethernet uses a loopback circuit to detect collisions. Half-duplex ethernet uses a jam signal
E. None of the above

10. [多选题]You need to configure a default route on a Ezonexam router. Which command will configure a default route on a router?

A. VE1(config) ip route 0.0.0.0 10.1.1.0 10.1.1.1
B. VE1(config) ip default-route 10.1.1.0
C. VE1(config) ip default-gateway 10.1.1.0
D. VE1(config) ip route 0.0.0.0 0.0.0.0 10.1.1.1

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