Lecture 1 Flashcards
1
Q
What is the Client-Server Architecture?
A
When the client and server are separate entities. The client requests a service from a server on a certain port.
2
Q
What port is DNS?
A
UDP/TCP 53.
3
Q
What are the well known port ranges?
A
0-1023
4
Q
What are the registered port ranges?
A
1024-32767
5
Q
What are the random port ranges?
A
32768-64k
6
Q
What type of duplex protocol is Layer 4?
A
A Full-Duplex (Two Way)
7
Q
What are the seven OSI Layers?
A
- Application
- Presentation
- Session
- Transport
- Network
- Data Link
- Physical
8
Q
What type of service is IP (Internet Protocol)?
A
- Connectionless service
- Unreliable
- Best Effort only
9
Q
Why would network unreliability arise?
A
- Resources are exhausted
- Network failure
10
Q
Is there data recovery at Layer 2?
A
No
11
Q
What are the four layers of TCP/IP?
A
- Application
- Transport
- Internet
- Network Access
12
Q
What layer does a router work on?
A
Layer 3
13
Q
What layer does a switch work on?
A
Layer 2
14
Q
What layer does a hub work on?
A
Layer 1
15
Q
How many bits are in an IPv4 Address?
A
32 bits
