CCNA系列认证章节练习(2020.05.06)

单项选择题
数据分段是OSI七层模型中的（）完成的
A.物理层
B.网络层
C.传输层
D.接入层
E.分发层
F.数据链路层
单项选择题
The router address 192.168.1.250 is the default gateway for both the Web Server 2 and Host 1. What is the correct subnet mask for this network?（）
A.255.255.255.0
B.255.255.255.192
C.255.255.255.250
D.255.255.255.252
单项选择题
While troubleshooting a connectivity problem, a network administrator notices that a port status LED on a Cisco Catalyst series switch is alternating green and amber. Which condition could this indicate?（）
A.The port is experiencing errors.
B.The port is administratively disabled.
C.The port is blocked by spanning tree.
D.The port has an active link with normal traffic activity.
多项选择题
The Testking Network consists of the following 5 IP networks:NETWORK 1: 192.168.10.0/26NETWORK 2: 192.168.10.64/27NETWORK 3: 192.168.10.96/27NETWORK 4: 192.168.10.128/30NETWORK 5: 192.168.10.132/30Which of the following routing protocols will support this IP addressing scheme?（）
A. RIP version 1
B. RIP version 2
C. IGRP
D. EIGRP
E. OSPF
F. BGP
单项选择题
请参见图示。网络管理员正在配置两台路由器之间的PPP链路。但是，PPP链路无法建立。根据show running-config命令的部分输出，此问题的原因是什么？（）
A.用户名不匹配
B.密码不匹配
C.密码应大于8个字符
D.接口IP地址位于不同子网中
多项选择题
Cisco安全代理CSA包括（）部分
A.策略中心
B.管理中心
C.安全代理
D.配置系统
多项选择题
What are three characteristics of the OSPF routing protocol?（）
A. It converges quickly.
B. OSPF is a classful routing protocol.
C. It uses cost to determine the best route.
D. It uses the DUAL algorithm to determine the best route.
E. OSPF routers send the complete routing table to all directly attached routers.
F. OSPF routers discover neighbors before exchanging routing information.
单项选择题
What is the effect of the following access list condition? access-list 101 permit ip 10.25.30.0 0.0.0.255 any（）。
A.permit all packets matching the first three octets of the source address to all destinations
B.permit all packets matching the last octet of the destination address and accept all source addresses
C.permit all packets from the third subnet of the network address to all destinations
D.permit all packets matching the host bits in the source address to all destinations
E.permit all packets to destinations matching the first three octets in the destination address
单项选择题
How does system management differ between Cisco and Cisco Small Business products?（）
A. Cisco Small Business products are supported by intuitive GUIs.
B. Cisco products are supported by multiple manageability options.
C. Cisco Small Business products offer multiple manageability interfaces.
D. Cisco products offer individual device management.
单项选择题
什么是IPv6地址B514的替代符号：82C3：0000：0000：0029：EC7A：0000：EC72？（）
A.B514：82C3：0029：：EC7A：0000：EC72
B.B514：82C3：0029：EC7A：EC72
C.B514：82C3：：0029：EC7A：0：EC72
D.B514：82C3：：0029：EC7A：EC72