计算机网络基础概念与IP协议解析-优快云博客

这篇内容主要探讨了网络层的关键知识点，包括数据包在网络层被称为datagram，最重要的两个功能是forwarding和routing。路由器通过目的地IP地址进行包转发，并依赖路由协议确定路径。此外，提到了IP协议属于网络层，提供主机到主机的服务，IPv4地址为32位，MAC地址为48位，互联网网络层的三个主要组件是IP协议、路由协议和ICMP。

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计算机网络题库(大连交通大学)chapter

Chapter 4 The Network Layer

1．What is the name of a network-layer packet?( )

message

segment

datagram

frame

2．What are the two most important network-layer functions in a datagram network? ( )

forwarding & routing

forwarding & filtering

routing & detecting

routing & checking

3．When a packet arrives at a router’s input link, the router must move the packet to the appropriate output link, this action is called ____? ( )

Forwarding

routing

cut through

filtering

4．The network layer must determine the path taken by packets as they flow from a sender to a receiver. This action is called____? ( )

Forwarding

routing

cut through

examine

5．A router forwards a packet by examining the value of a field in the arriving packet’s header, and then using this value to index into the router’s forwarding table, this value is? ( )

destination IP address

source IP address

destination MAC address

source MAC address

6．IP belongs to ____ layer? ( )

transport

network

data link

physical

7．Which layer provides host-to-host services? ( )

transport

network

data link

physical

8．Which layer provides a connection service called virtual-circuit networks and a connectionless service called datagram networks? ( )

transport

network

data link

physical

9．IPV4 has a ___ bit address? ( )

10．MAC address is ____ bits? ( )

11．The Internet’s network layer has three major components, the first component is the IP protocol, the second component is the routing protocol, the final component is____? ( )

forwarding

address translation

check

ICMP

12．How many bits specify the IP protocol version in a datagram? ( )

1 bit

2 bits

4 bits

8 bits

13．Most IPV4 datagram do not conta