tunnel local area network (LAN) wide area network (WAN)
subnet mask gateway mask 66 and 67 used by default to talk to server different eitherend? network address translation
masks
+ ports internet
ipv4 + Network interface controller (NIC) can connect computer to network + each one has unique media access control (MAC) addresses + a.b.c.d * if a between 0 and 127 inclusiive, class A network * 127.0.0.1 reserved for local oopback. nothing else in 127 space * localhost alias * 128 to 191 is class B * 192 to 223 is class C. local networks * private includes 127.0.0.1 (localhost) 1. 10.x.x.x 2. 172.16-31.x.x 3. 192.168.x.x
internet: + router has IP address on local network, eg 192.168.0.1 + router has IP on internet too
ipv6 page network address translation (NAT) page. aimed at resolving running out of ipv4
time to live (ttl) expire message from router if packet expires
tcp and udp on networking transmission control protocol (TCP) user diagram protocol (UDP) interpret protocol (IP)