Clyde Notes Flashcards
How many messages does it take to translate server name into IP
6
How many messages setup TCPIP connection
3
How many messages to send HTTP Get request
4
How many messages to tear down connection
4
What is a network at the lowest level
2+ Computers connected by a link
TCP/IP
Transport Control Protocol/Internet Protocol. Defines how information is transmitted over the internet
IP Address
4 numbers separated by a . that uniquely identify each host on the internet. Used to route information, no two hosts can have the same IP.
SMTP
Simple Mail Transfer Protocol. Defines how email is sent online
How did packet switching come about
Military swapped to packet switching because circuit switching was too fragile
First packet switched network
ARPANET in 1969
Internetting Project
When packet switched networks were connected together
WAN Transmission Lines
There are many transmission lines that connect routers in a WAN
Network Layer in terms of transmission
Lowest Layer that deals with end to end transmission. Wants to get packets to destination.
Routing algorithms
Determine how network chooses path to take, decides which output line an incoming packet should be transmitted on.
Store and Forward (Packet Switching)
Host sends a packet to nearest router, packet stored there until it has arrived and verified checksum.
Forwarded to next router until destination is reached.