Week 1-2 physical layer Flashcards
1
Q
What is a computer network?
A
End devices connecting to intermediary.
2
Q
LAN vs WAN!
A
Local area network
-one organization
Wide area network
-more then one organization
3
Q
MAC vs IP Address
A
MAC (Switch layer 2)
- burnt in
- only used for local communication
IP Address (Router layer 3)
- changes with location
- used between routers
4
Q
What is Manchester encoding?
A
Low to high is 1
High to low is 2
5
Q
What is net work media?
A
Different cable types in networking
- copper
- finer
- wireless
6
Q
What are the UTP cables?
A
- Strait through
- crossover
- rollover
7
Q
What cable would you use to connect a Router to a PC?
A
A rollover cable. It’s a special case ;0
8
Q
What are the types of finer cables and what are there characteristics?
A
Single mode -fast! -Very thin core -Uses laser light source Multi mode -THIC core -light bounces around in there
9
Q
What are the first 4 OSI models and what do they use?
A
Session (segments)
Network (packets)
Data link (frames)
Physical (bits)
