Chapter 4 - Protocols

Question 1

What is a Three-way handshake?

Answer 1

A 3 step process where transport layer protocols establish a connection between nodes

Question 2

What is a checksum?

Answer 2

Method of error checking, to see if arriving data matches data the receiving unit sent - String of characters that is sent to the destination then the designation generates a similar string, if they match, they are good

Question 3

What is a Protocol Analyzer?

Answer 3

Software or hardware-based tool that can capture and analyze data on a network

Question 4

What is a SYN?

Question 5

What is an ACK?

Question 6

What is ARP?

Answer 6

Address Resolution Protocol - At the data link layer - Works with IPv4 to discover the MAC address of a node on the local network & to maintain a data base that maps IPv4 addresses to MAC addresses

Question 7

What is an ARP table?

Answer 7

Database of IP-to-MAC address mapping, usually stored on a computer’s hard disk

Question 8

What are Dynamic ARP table entries?

Answer 8

When a client makes an ARP request for info that could not be satisfied by data already in the ARP table, but then updated after info is recorded

Question 9

What are Static ARP table entries?

Answer 9

Those that have been entered manually using the ARP utility

Question 10

What is NDP?

Answer 10

Neighbor Discovery Protocol - At the data link layer -

Question 11

What is Ethernet II?

Answer 11

Current Ethernet standard, contains 2-byte type field

Question 12

What is the LLC?

Answer 12

Logical Link Control - Upper portion of the Data Link layer - Identifies the type of message and handles multiplexing, flow and error control, and reliability