表示层
























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「表示层」的各地常用別名
中国大陸
表示层
港臺
表現層































OSI模型

应用层（application layer）
OSI Layer 7



  • DHCP（v6）

  • DNS

  • FTP

  • Gopher


  • HTTP（SPDY、HTTP/2）

  • IMAP4

  • IRC

  • NNTP

  • XMPP

  • POP3

  • SIP

  • SMTP

  • SNMP

  • SSH

  • TELNET

  • RPC

  • RTCP

  • RTP

  • RTSP

  • SDP

  • SOAP

  • GTP

  • STUN

  • NTP

  • SSDP

  • 更多

表示层（presentation layer）
OSI Layer 6

该层被弃用。应用层的HTTP、FTP、Telnet等协议有类似的功能。传输层的TLS/SSL也有类似功能。

会话层（session layer）
OSI Layer 5

该层被弃用。应用层的HTTP、RPC、SDP、RTCP等协议有类似的功能。

传输层（transport layer）
OSI Layer 4



  • TCP（T/TCP · Fast Open）

  • UDP

  • DCCP

  • SCTP

  • RSVP

  • PPTP

  • TLS/SSL

  • 更多

网络层（network layer）
OSI Layer 3



  • IP（v4·v6）


  • ICMP（v6）

  • IGMP

  • IS-IS

  • IPsec

  • BGP

  • RIP

  • OSPF

  • RARP

  • 更多

数据链路层（data link layer）
OSI Layer 2



  • Wi-Fi（IEEE 802.11）

  • ARP


  • WiMAX（IEEE 802.16）

  • ATM

  • DTM

  • 令牌环

  • 以太网

  • FDDI

  • 帧中继

  • GPRS

  • EV-DO

  • HSPA

  • HDLC

  • PPP

  • PPPoE

  • L2TP

  • ISDN

  • SPB

  • STP

  • 更多

物理层（physical layer）
OSI Layer 1


  • 以太网

  • 调制解调器

  • 电力线通信

  • 同步光网络

  • G.709

  • 光导纤维

  • 同轴电缆

  • 双绞线

  • 更多

表示层(Presentation)为不同终端的上层用户提供数据和信息正确的语法表示变换方法。如文本文件的ASCII格式和EBCDIC，用于表示数字的1S或2S补码表示形式。



表示层的主要功能



  • 数据语法转换

  • 语法表示

  • 连接管理

  • 数据处理

    • 数据加密和解密

    • 数据压缩和解压

    • 数据编码和解码





具有表示层功能的协议




  • HTTP/HTML

  • FTP

  • Telnet

  • ASN.1




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