Lenny wants to know Mr Smith’s requirements for the conference before December 20th, because ______.
A. he only has one week to prepare for the conference.
B. he has to talk with the hotel to prepare the audio-visual equipment needed
C. he has to buy the facilities on e-shop.
D. he has to negotiate with his General Manager
查看答案
OSI参考模型中,能实现路由选择,拥塞控制与互联功能的层是()。
A. 传输层
B. 应用层
C. 数据链路层
D. 网络层
下面属于TCP/IP协议族中网络层协议的是()。
A. IGMP、UDP、IP
B. IP、DNS、ICMP
C. ICMP、ARP、IGMP
D. RIP、IGMP、SMTP
下列不属于网络协议三要素的是()。
A. 语音
B. 语法
C. 语义
D. 时序
在OSI参考模型中,自下而上第一个提供端到端服务的层是()。
A. 数据链路层
B. 会话层
C. 传输层
D. 应用层