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网管会 一些基础知识

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  • 1. 201136

2. 3.

  • 1969

| Internet 4.

  • 1971

| Internet 5.

  • 1991

| Internet 6.

| Internet 7.

  • David D. Clark
    • The Design Philosophy of the DARPA Internet Protocols
  • Fundamental Goal: Connecting existing networks

| 8.

  • David D. Clark
    • The Design Philosophy of the DARPA Internet Protocols
  • Second Level Goal
    • Survivability (in the face of failure)
    • Support multiple types of services
    • Must accommodate a variety of networks
    • Allow distributed management
    • Be cost effective
    • Allow resource accountability
    • etc.

|

9.

| 10.

| BR BR 11.

| 1# 2# 9# 12. | 13. | 2 -> 1 -> 3 -> 4 -> 5 -> 14. 15. | 16. | Reseted by peer 17. | ping Task: 18.

    • - - Network
    • - - Communication
    • - - Protocol
    • -

| 19.

    • etc.

| 20.

| 21.

    • A B A

| 22.

| ICMP 23. | ICMP echo request ICMP echo reply TCP 24.

  • DHCP Dynamic Host Configuration Protocol

| DHCP DHCP DHCP DHCP-Discover DHCP-Request DHCP-Offer DHCP-Ack 25. | ping ARP who is 219.218.115.254?Tell 219.218.115.138 219.218.115.138 ping www.geektu.com DNS geektu.com 219.218.115.254 is at 00-0f-e2-8e-7a-02 DNS query: A www.geektu.com DNS response: CNAME geektu.com A 67.220.209.22 DNS query: AAAA www.geektu.com DNS response: CNAME geektu.com ICMP echo request ICMP echo reply Windows4ping 26. 27.

| 28.

    • 1, 2, , 9, 0digit

| 1 2 9 0 10 29.

| 1, 2, , 9, 0 x x 1 x 10 0 y y 10 y 10 1 z z 100 z 10 3 30.

    • 1, 2, , 90
      • 10
      • 10 0
      • 10 1
      • 10 2
      • n 10 n -1
    • n 0 - 10 n -1
    • m
      • 10
      • 10

| Task: 31.

  • binary 102
    • 10
      • 2
      • 2 0
      • 2 1
      • 2 2
      • n 2 n -1
    • n 0 - 2 n -1
    • m
      • 2
      • 2

| 32.

  • (10101100) 2->

| 33.

  • 240 ->

| 34.

  • 1, 1, 1, 1
    • Geek 11