ITE 384 Exam 1 Study Guide

What are the layers of the TCP/IP model?

5. Application
4. Transport
3. Network
2. Data Link
1. Physical

What is the unit of communication at the Physical layer?

Bit

What is the unit of communication at the Data Link layer?

Frame

What is the unit of communication at the Network layer?

Datagram

What is the unit of communication at the Transport layer?

Segment / Packet

What is the unit of communication at the Application layer?

Message

Addressing used at layer 2?

Physical Address (MAC Address)

Addressing used at layer 3?

Logical Address (IP Address)

Addressing used at layer 4?

Port Addresses (Port Number)

Delivery type for layer 2?

Hop-to-Hop (Node-to-Node)

Delivery type for layer 3?

Source to Destination

Delivery type for layer 4?

Process to Process

Process of Encapsulation/Decapsulation

Command to set yourself as root user

Sudo-s

Command to edit files

vi (name of file)

Command to check interfaces

ip a

What is the purpose of the Destination Address Field?

the purpose of the destination address field is to route the message to its destination.

What is the purpose of the PDU field?

the purpose of the PDU field is to define what protocol the message should follow.

What is the largest data size that can be carried in an Ethernet frame?

1500

What is the smallest valid Ethernet frame size?

64

Preamble

contains 7 bytes of alternating 0s and 1s that alerts the receiving system to the incoming frame and enables it to synchronize its input timing.

SFD (Start Frame Delimter)

signals the beginning of the frame to warn the receiver that this is the last chance to synchronize. It is always 10101011.

Type of address used for Destination address?

the physical address (MAC) of the destination

Type of address used for Source address?

the physical address (MAC) of the souce.

Header Field length?

20-60 bytes

IP Datagram length?

20-65,535 bytes