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Summary of computer network knowledge

Source: Internet
Author: User
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(1) Various layers of the network

  2. Physical layer: RJ45, CLOCK, IEEE802.3 (Repeater, hub, Gateway)-
  4. Data link: PPP, FR, HDLC, VLAN, MAC (bridge, switch)-
  6. Network layer: IP, ICMP, ARP, RARP, OSPF, IPX, RIP, IGRP, (router)-
  8. Transport layer: TCP, UDP, SPX-
  10. Session layer: NFS, SQL, NETBIOS, RPC-
  12. Presentation layer: JPEG, MPEG, Asii-
  14. Application tier: FTP, DNS, Telnet, SMTP, HTTP, WWW, NFS

(2) The biggest advantage of the switch is the fast, the biggest advantage of the router is the strong control ability. The switch works at the data link layer to see the MAC address,

Router works at the Internetwork View IP address

Summary of computer network knowledge

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