IPv4（Internet Protocol version 4）使用多少bits来代表一台主机的IP？（）

A . Reduced travel time for instructors responsible for different geographic sites B . Real-time discussions of patient information among remote medical teams C . Improved morale and reduced turnover among employees who receive timely business updates D . Increased sales and customer satisfaction due to current product information disseminated simultaneously to a global sales force by headquarter

A . Call management software B . Media Convergence Servers (MCSs) C . Voice gateways D . IP telephone

A . 16位 B . 32位 C . 64位 D . 128位

A . 正确 B . 错误

A . IGMP snooping and Cisco Group Membership Protocol (CGMP) can be used simultaneously on a switch. B . IGMP snooping a nd Cisco Group Membership Protocol (CGMP) were developed to help Layer 3 switches make intelligent forwarding decisions on their own. C . IGMP snooping examines IGMP join/leave messages so that multicast traffic is forwarded only to hosts that sent an IG MP message toward the router. D . IGMP snooping is an IP multicast constraining mechanism for Layer 2 switches. E . IGMP snooping is enabled with the ip multicast - routing global configuration command.

A . Native IPv6 B . Point - to -point tunnels C . Multipoint tunnels D . NAT - PT E . Dual stack

A . 正确 B . 错误

A . 8位 B . 16位 C . 32位 D . 64位

A . There are three IGMP modes: dense mode, sparse mode, and sparse - dense mode B . IGMP is used to register individual hosts with a multicast group C . IGMP version 3 enables a multicast receiving host to specify to the router which sources it should forward traffic from D . IGMP messages a re IP datagrams with a protocol value of 2, destination address of 224.0.0.2, and a TTL value of 1 E . IGMP is a multicast routing protocol that makes packet - forwarding decisions independent of other routing protocols such as EIGRP F . IGMP snooping ru ns on Layer 3 router

A . IPv5 B . IPv6 C . IPv7 D . IPv8

A . proxy B . dual-stack C . tunneling D . dot1q

A . 32 B . 64 C . 16 D . 128

A．192.168.1.1/24 B．172.32.1.1/24 C．172.16.255.254/24 D．10.255.255.254/24

A．100.1.1.1 B．50.1.1.1 C．10.1.1.1 D．200.1.1

此题为判断题(对，错)。

A．4字节 B．8字节 C．16字节 D．5

A．互联网草案 B．互联网协议 C．互联网通讯协议 D．互联网通讯指引