1.When a router boots, which default search sequence does it use to locate the IOS software?
A. Flash, TFTP server, ROM
B. NVRAM, TFTP server, ROM
C. ROM, Flash, TFTP server
D. ROM, NVRAM, TFTP server
Answer: A
Explain ：默认情况下，路由器首先会试图用系统Flash存储器中的第一个文件来启动，如果失败，路由器就会试图用TFTP从网络上加载IOS，如果还失败，系统就从ROM中加载启动。 NVRAM 中用于存放 Startup-config 路由器配置文件，不存储 IOS software.
2.Which sequence of actions will allow telneting from a user's PC to a router using TCP/IP?
A. Connect the PC's COM port to the router's console port using a straight-through cable.
B. Connect the PC's COM port to the router's console port using a crossover cable.
C. Connect the PC's COM port to the router's Ethernet port using a straight-through cable.
D. Connect the PC's ethernet port to the router's Ethernet port using a crossover cable.
E. Connect the PC's Ethernet port to the router's Ethernet port using a rollover cable.
F. Connect the PC's Ethernet port to the router's Ethernet port using a straight-through cable.
Answer: D
Explain ：
A. B
PC’s COM 与 路由器的console port 应该用： rollover 线缆（全交叉）连接
C
PC’com 口不可以与路由器的Ethernet 连接
D
PC的ethernet 与路由器的ethernet口应该用crossover 线缆(交叉线)连接，通过TELNET 可以配置路由器
同理 E , F 错
3.You are given a PC, a router, and a cable. Select the correct combination that
will allow you to log into the router locally using a terminal emulation program
such as HyperTerminal.
A. Connect the PC's COM port to the router's console port using a straight-through cable.
B. Connect the PC's COM port to the router's console port using a rollover cable.
C. Connect the PC's COM port to the router's ethernet port using a straight-through cable.
D. Connect the PC's ethernet port to the router's ethernet port using a rollover cable.
E. Connect the PC's ethernet port to the router's ethernet port using a straight- through cable.
Answer: B
Explain ：PC’s COM 与 路由器的console port 应该用： rollover 线缆（全交叉）连接
4.Which of the following access list statements will deny all telnet connections
to subnet 10.0.1.0/24?
A. access-list 15 deny tcp 10.0.1.0 255.255.255.0 eq telnet
B. access-list 115 deny tcp any 10.0.1.0 eq telnet
C. access-list 115 deny udp any 10.0.1.0 eq 23
D. access-list 115 deny tcp any 10.0.1.0 0.0.0.255 eq 23
E. access-list 15 deny telnet any 10.0.1.0 0.0.0.255 eq 23
Answer: D
Explain ：
1．访问列表过滤TELNET 必须使用扩展访问列表， 列表号为： 100－199
2．telnet 是基于 TCP
3．subnet 10.0.1.0/24 在访问列表中的反码表达方式为： 10.0.1.0 0.0.0.255
5.Which command is used to display the placement and direction of an IP access
control list on a router?
A. show access-list
B. show ip route
C. show ip interface
D. show interface
E. show interface list
F. show ip interface brief
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