Network
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OSI 7 Layer encapsulation / de-encapsulation service : DNS(53) , SMTP(25), POP3(110), IMAP(143), HTTP(80), HTTPS(443), FTP(20,21), SSH(22), TELNET(23), DHCP(67,68), TFTP(69) 등 전송방식 : 신속 UDP , 정확 TCP 주소방식 : IP v4 v6 , ICMP , IGMP, ARP, RARP (그외 routing protocol) 스위칭방식 : 이더넷 (MAC) *network device L1 - Hub : data 신호 변환 (프로토콜 인식 X) flooding 동작(들어온 포트를 제외하고 모든 포트로 전달함) L2 - Switch : data/신호 변환 + 이더넷 ..
4/19~21 OSI 7 Layer, Address, Subnetting, VLSM, 네트워크 장비 비교 등 정리OSI 7 Layer encapsulation / de-encapsulation service : DNS(53) , SMTP(25), POP3(110), IMAP(143), HTTP(80), HTTPS(443), FTP(20,21), SSH(22), TELNET(23), DHCP(67,68), TFTP(69) 등 전송방식 : 신속 UDP , 정확 TCP 주소방식 : IP v4 v6 , ICMP , IGMP, ARP, RARP (그외 routing protocol) 스위칭방식 : 이더넷 (MAC) *network device L1 - Hub : data 신호 변환 (프로토콜 인식 X) flooding 동작(들어온 포트를 제외하고 모든 포트로 전달함) L2 - Switch : data/신호 변환 + 이더넷 ..
2021.04.28 -
10.1.2.3 A class A class defualt subnetmask 255.0.0.0 Network ID 255. Host ID .0.0.0 10. Network ID .1.2.3 Host ID 10.0.0.0 ~ 10.255.255.255 .0.0.0 -> 10.0.0.0 Network address .255.255.255 -> 10.255.255.255 Broadcast 10.0.0.1 ~ 10.255.255.254 - 10.1.2.3 172.16.1.10 ??? B class B class default subnetmask? 255.255.0.0 Network ID 172.16 Host ID .1.10 172.16.0.0 ~ 172.16.255.255 172.16.0.0 network a..
4/20 IP 주소 체계2, Logical/Physical Address10.1.2.3 A class A class defualt subnetmask 255.0.0.0 Network ID 255. Host ID .0.0.0 10. Network ID .1.2.3 Host ID 10.0.0.0 ~ 10.255.255.255 .0.0.0 -> 10.0.0.0 Network address .255.255.255 -> 10.255.255.255 Broadcast 10.0.0.1 ~ 10.255.255.254 - 10.1.2.3 172.16.1.10 ??? B class B class default subnetmask? 255.255.0.0 Network ID 172.16 Host ID .1.10 172.16.0.0 ~ 172.16.255.255 172.16.0.0 network a..
2021.04.28 -
naver.com : domain name server : www mail cafe blog www.naver.com mail.naver.com cafe.naver.com blog.naver.com * Oracle VM VirtualBox 한글 안나올때 -> Alt키만 누르면 됨 * https://www.virtualbox.org/wiki/linux_Downloads first ip: Network Address, Host ID = 0 routing table last ip address : broadcast address (방송용 주소) MAC Address length : 6byte=48bit 3byte(OUI)+3byte(P ID) IP Address version 4 length : 4byte=3..
4/19 IP 주소 체계 및 클래스, 공인/사설 IPnaver.com : domain name server : www mail cafe blog www.naver.com mail.naver.com cafe.naver.com blog.naver.com * Oracle VM VirtualBox 한글 안나올때 -> Alt키만 누르면 됨 * https://www.virtualbox.org/wiki/linux_Downloads first ip: Network Address, Host ID = 0 routing table last ip address : broadcast address (방송용 주소) MAC Address length : 6byte=48bit 3byte(OUI)+3byte(P ID) IP Address version 4 length : 4byte=3..
2021.04.28