Introduction and Overview Flashcards
Devices connected to the Internet are known as ___________
End systems or hosts
End systems are interconnected via
Communication links and packet switches
Communication links are composed of _______
Physical media
Examples of physical media are_____
Coaxial cable, copper wire,optical fibre and radio spectrum
Links transmit data at what rate
Bits/second
What is added to data to segmented data transferred over a network
Header bytes
What role does a packet switch play
It’s takes a packet and forwards it on one of its outgoing communication links
Packet switches are broadly categories into
Link layer switches and routers
Link layer switches are used in which part of the network _________
Access networks
Routers are used in ____
Network core
Examples of Residential broadband access include
DSL
Cable modem
Mobile wireless access
High speed LAN
An ISP is a network of
Packet switches and communication links
ISPs are broadly grouped into
Lower tier ISPs
Upper tier ISPs
ISPs are interconnected through national and international upper tier ISPs that are in turn interconnected via
Lower-tier ISPs
Which ISP consists of high speed routers interconnected with high speed fiber optic links
Upper tier ISP
The protol stack consists of
Application layer
Transport layer
Session layer
Network layer
Link layer
Physical layer
