NETWORK PROTOCOLS Flashcards
network layer STRUCTURE
application
transport
network
link
APPLICATION layer
Data needs to be broken up into small packets, which are then reassembled at the destination.
Transmission Control Protocol [TCP] is used to ensure reliable transport of those packets
User Datagram Protocol [UDP] A faster but less reliable transport protocol
TRANSPORT layer
The data must pass from router to router until it finally reaches its destination
a strategy that comes from the Internet routing protocol
NETWORK layer
- Once a network is bigger than two computers, we need addressing protocols to uniquely identify who is sending data and who should receive the data.
LINK layer
- At the bottom layer, two computing devices need a physical mechanism to send digital data to each other.
COMPUTER NETWORK is
an interconnected collection of autonomous computers
a SERVER is
a network computer that contains
hard drives
printers
resources that are shared with other computers
a MAN is
metropolitan area network
WAN is
wide area network
LAN is
local area network
a CLIENT is
a computer on the network that is not a server
a CLIENT/SERVER network is
found where there are a lot of computers
servers hold data and share resources to clients on the network
client/server ADVANTAGES
data files stored on one server
users + permissions stored on one server
a central point of admin
centralised management of large number of users
strong security that is centralised
client/server DISADVANTAGES
single point of failure
expensive
requires network admin to manage it
difficult to set up
POP3 is
post office protocol 3
a client-server protocol in which email is received and held by your internet provider
