Section 2: Network Models

Question 1

Name/Describe all layers of the OSI Model

Answer 1

Physical
Data Link
Network
Transport
Session
Presentation
Application

Question 2

Name/Describe all layers of the TCP/IP Model

Answer 2

Network Interface (link)
Internet
Transport
Application

Question 3

Correspond the TCP/IP layers with their OSI equivalents

Answer 3

Network Interface (link)-Physical, Data link
Internet-Network
Transport-Transport
Application-Session, Presentation, Application

Question 4

What is the maximum size of a frame/packet

Answer 4

1500 bytes

Question 5

Where are frames created/destroyed

Answer 5

Network Interface Card (NIC)

Question 6

What do NICs use to decide where to send a frame?

Answer 6

MAC Addresses

Question 7

Explain Broadcast vs Unicast

Answer 7

Broadcast MAC addresses (all Fs) will be sent to all computers on the network (Broadcast Domain).

Question 8

What is Logical Addressing?

Answer 8

IP addresses which are unique addresses to the network that are sent within the frame

Question 9

What is the default gateway for an IP packet?

Answer 9

The address of the local router

Question 10

Does the IP packet within a frame ever change?

Answer 10

No

Question 11

What are the uses of ports?

Answer 11

Port numbers are unique keys for individual applications that direct packet traffic. The first 1024 are reserved.

Question 12

What is TCP?

Answer 12

A connection oriented conversation containing a sequence number and acknowledgement number used to organize packets in the correct order

Question 13

What is UDP?

Answer 13

Like TCP but it is connectionless?