i TCP/IP NIC Intel 3com NIC TCP/IP *1 20 IPv4 IPv6 IPv6 TCP/IP TCP/IP *1 3

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1 i TCP/IP NIC Intel 3com NIC TCP/IP *1 20 IPv4 IPv6 IPv6 TCP/IP TCP/IP *1 3

2 ii IPv4 IPv4 *2 *3 IPv6 5 IPv6 UDP UDP IP UDP IP TCP/IP IPv6 IPv4 TCP/IP IPv6 TCP/IP TCP/IP TCP/IP TCP/IP IPv6 IPv4 TCP/IP TCP/IP IPv6 TCP/IP IPv6 TCP/IP NAT NAPT *2 IPv4 *3 IPv6 92 TCP/IP IT TCP/IP TCP/IP TCP/IP IPv4 IPv6 TCP/IP TCP/IP TCP/IP UDP TCP UDP UDP TCP TCP SMTP IPv6 iii

3 iv v NAT TCP/IP NAPT IPv4 ) 1 TCP/IP IP TCP/IP TCP/IP OSI ( 1) SLIP PPP ( 2) MAC ( 1)

4 vi vii 5 ( IP IPv IP CIDR ICMP IP ( 1) ( 2) UDP UDP UDP NAPT IP NAPT NAPT NAPT A TCP 181 A.1 ACK A.2 (MSS Maximum Segment Size) A.3 Nagle A A A B 189 B ( 3) TCP TCP NAT NAT NAT

5 ix TCP/IP OSI ALTO ALOHA MAC STP Base-T 100Base-TX Cat.5e Cat Com EtherLink III PCI B5B+MLT Tier IPv IPv

6 x xi IPv IPv IPv IPv ICMP ICMP ARP ARP NDP MAC NAPT IPv IPv UDP UDP UDP way Handshake TCP ACK (1) (2) (3) (4) ACK TCP TCP TCP RRQ/WRQ DATA ACK ERROR

7 1 1 TCP/IP TCP/IP TCP/IP TCP IP LAN TCP/IP Alice Bob 1.1 IP RFC * IP (IPoAC IP over Avian Carrier) * 2 IPoAC *3 IPoAC IPoAC RFC RFC 4 1 RFC IPoAC RFC IPoAC *1 Request for Comment *2 *3 avian carrier

8 2 1 TCP/IP RFC1149 RFC () (Interplanetary Internet) 1.2 IPoAC IPoAC Alice Bob Alice TCP/IP Alice Bob Bob Alice Alice Alice Alice Bob Bob Alice Alice Bob TCP 3way- Handshake Alice Bob IPoAC Alice Bob Alice Bob IPoAC Bob Alice Bob Bob Alice Alice Alice Bob TCP/IP TCP Bob 1 Alice 2 2 Alice 2 2 2

9 4 1 TCP/IP Alice Bob TCP/IP UDP IPoAC * 4 tu IPv4 IPv6 * IPoAC IPoAC IPoAC IPoAC TCP/IP (Protocol)

10 6 1 TCP/IP TCP/IP Transmission Control Protocol/Internet Protocols IP TCP IP TCP/IP TCP IP UDP IPoAC IPoAC IP IP over Avian Carriers 1.3 TCP/IP 1.3 TCP/IP 7 TCP/IP TCP IP?? TCP/IP IPoAC 1.2 n n n 1 n TCP/IP 1.1 Two can and tin. 4 IPv4 6 IPv6 IPv4 IPv6 * 5 WAN *5

11 8 1 TCP/IP TCP UDP TCP/IP 1.4 TCP/IP () TCP/IP TCP/IP CPU TCP/IP PPP ATM(Asynchronous Transfer Mode) 53byte WAN GPON(Gigabit Passive Optical Network) IP IP 4 IP IP IPv4 IPv6

12 10 1 TCP/IP IPv4 IPv6 IP IP IP TCP UDP TCP TCP UDP UDP UDP IP UDP TCP UDP TCP/IP TCP UDP SMTP HTTP TCP DNS SNMP UDP 1.3 TCP UDP TCP TCP UDP TCP/IP

13 12 1 TCP/IP IP VPN(Virtual Private Network) 1979

14 14 1 TCP/IP 1.7 TCP/IP OSI 15 TCP/IP DX 1.7 TCP/IP OSI OSI (Open Systems Interconnection Reference Model) *6 OSI TCP/IP IEEE TCP/IP OSI TCP/IP OSI TCP/IP OSI L7 L6 L5 L4 L3 L2 L1 1.3 OSI htbp 1.5 TCP/IP OSI OSI TCP/IP TCP/IP OSI TCP/IP OSI OSI OSI TCP/IP OSI TCP/IP OSI *6 OSI7 OSI TCP/IP OSI OSI TCP/IP OSI OSI OSI OSI

15 16 1 TCP/IP 1.7 TCP/IP OSI 17 OSI 3 TCP/IP OSI TCP/IP OSI OSI OSI OSI TCP/IP OSI L( 2 L3 OSI HUB OSI L2 2 SW-HUB OSI 2 L1 1 PON L1 TCP/IP OSI 3 L3 L3 HUB L4 L5 L7 L2 L3 L4 L4 L5 L7 L4 IP 4 IP L4 L5 L5 TCP/IP SSL/TLS L5 * 7 L5 SSL/TLS SSL SSL-VPN L5 L7 L7 7 Web HTTP L7 Web WAF(Web Application Firewall) L7 OSI L8 L9 L10 *8 OSI OSI L8 L9 L10 L8 L9 L10 *7 SSL/TLS OSI L6 *8 Nobody expects the Spanish Inquisition!

16 18 1 TCP/IP L10 L9 L8 1.4 OSI L8 L8 L8

2 1: OSI OSI,,,,,,,,, 4 TCP/IP TCP/IP, TCP, IP 2,, IP, IP. IP, ICMP, TCP, UDP, TELNET, FTP, HTTP TCP IP

2 1: OSI OSI,,,,,,,,, 4 TCP/IP TCP/IP, TCP, IP 2,, IP, IP. IP, ICMP, TCP, UDP, TELNET, FTP, HTTP TCP IP 1.,.. 2 OSI,,,,,,,,, TCP/IP,, IP, ICMP, ARP, TCP, UDP, FTP, TELNET, ssh,,,,,,,, IP,,, 3 OSI OSI(Open Systems Interconnection: ). 1 OSI 7. ( 1) 4 ( 4),,,,.,.,..,,... 1 2 1: OSI OSI,,,,,,,,, 4 TCP/IP TCP/IP,

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