【名词&注释】
过滤器(filter)、路由器(router)、交换机(switch)、数据包(packet)、物理层(physical layer)、通配符(wildcard)、数据链路层(data link layer)、源地址(source address)
[单选题]下列路由协议中，属于链路状态路由协议的是（）
A. RIP
B. EIGRP
C. IGRP
D. OSPF
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举一反三：
[单选题]为了查看路由器的E0端口上，是否挂接了访问权限表，应该使用的命令是（）
A. show access-list
B. show interface e0
C. show ipinterface e0
D. show e0
[单选题]下列哪一个通配符(wildcard)掩码与子网172.16.64.0/27的所有主机匹配（）。
A. 255.255.255.0
B. 255.255.224.0
C. 0.0.0.31
D. 0.0.31.255
[单选题]交换机工作在OSI七层模型的哪一层()
A. 物理层
B. 数据链路层(data link layer)
C. 网络层
D. 传输层
[多选题]The Ezonexam network administrator wants to ensure that only a single web server can connect to pot Fa0/1 on a catalyst switch. The server is plugged into the switch's Fast Eth. 0/1 port and the network administrator is about to bring the server online. What can the administrator do to ensure that only the MAC address of this server is allowed by switch port Fa0/1? (Choose two)
A. Configure port Fa0/1 to accept connections only from the static IP address of the server
B. Configure the MAC address of the server as a static entry associated with port Fa0/1
C. Employ a proprietary connector type on Fa0/1 that is incomputable with other host connectors
D. Configure port security on Fa0/1 to reject traffic with a source MAC address other than that of the server
E. Bind the IP address of the server to its MAC address on the switch to prevent other hosts from spoofing the server IP address
[多选题]With regard to Ethernet media access methods, which of the following are true?(Choose all that apply.)
A. A device waits for an electronic signal before transmitting.
B. A device listens and waits until the media is not busy before transmitting.
C. All devices on an Ethernet segment see data that passes on the network medium.
D. Only the sender and the receiver devices see data that passes on the network medium.
E. Ethernet networks allow you to configured devises with higher transmission priority.
[单选题]下列对访问控制列表的描述不正确的是（）。
A. 访问控制列表能决定数据是否可以到达某处
B. 访问控制列表可以用来定义某些过滤器
C. 一旦定义了访问控制列表，则其所规范的某些数据包就会严格被允许或拒绝
D. 访问控制列表可以应用于路由更新的过程当中
[单选题]A new Ezonexam switch is installed into an existing LAN and a new VTP trunk is set up with an existing switch. Which VLANs will be allowed on this new trunk?
A. All defined VLANs are allowed on the trunk by default.
B. Each VLAN, or VLAN range, that is specified with the switchport mode command.
C. Each VLAN, or VLAN range, that is specified with the vtp domain command.
D. Each VLAN, or VLAN range, that is specified with the vlan database command.
E. None of the above
[单选题]访问控制列表分为标准和扩展两种。下面关于ACL的描述中，错误的是()。
A. 标准ACL可以根据分组中的IP源地址(source address)进行过滤
B. 扩展ACL可以根据分组中的IP目标地址进行过滤
C. 标准ACL可以根据分组中的IP目标地址进行过滤
D. 扩展ACL可以根据不同的上层协议信息进行过滤
[单选题]You have a class C network, and you need to design it for 5 usable subnets with each subnet handling a minimum of 18 hosts each. Which of the following network masks should you use?
A. 225.225.224.0.
B. 225.225.240.0.
C. 225.225.255.0.
D. 255.255.255.224
E. 225.225.255.240
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