Chapter 3 - Addressing

Question 1

What is an Interface?

Answer 1

Network connection made by a node on a network

Question 2

What entails an IPv4 address?

Answer 2

32 bits, 4 octets (8 bits x 4)

Question 3

What entails an IPv6 address?

Answer 3

128 bits, 8 blocks of hex numbers, each hex is 16 bits

Question 4

What is a domain name?

Answer 4

The last end of a FQDN or Site name
Domain of ethan.bigelow.com is bigelow.com

Question 5

What is a hostname?

Answer 5

The initial part of a FQDN
Hostname of ethan.bigelow.com is ethan

Question 6

What is IANA?

Answer 6

Internet Assigned Numbers Authority - Responsible for tracking IP addresses, port numbers, and domain names

Question 7

What is ICANN?

Answer 7

Internet Corporation for Assigned Names & Numbers - Nonprofit charged with setting many policies that guide how the internet works

Question 8

What is a OUI?

Answer 8

Organizationally Unique Identifier - Identifies the NIC’s manufacture and is assigned by the IEEE
MAC address is 00:1B:2C:AE:6E:D4 - OUI = 00:1B:2C

Question 9

What is the Extension Identifier and/or Device ID?

Answer 9

The last 24 bits of the MAC address
MAC address is 00:1B:2C:AE:6E:D4 - Device ID = AE:6E:D4

Question 10

What is a subnet mask?

Answer 10

A 32-bit number that helps one computer find another

Question 11

What is a Network ID?

Answer 11

Part of the IP address that is common to all nodes on the same network

Question 12

What is a Host ID/Node ID?

Answer 12

Part of the IP address that identifies the host on a network

Question 13

What is a gateway?

Answer 13

A computer, router, firewall, or other device that a host uses to access another network

Question 14

What is a default gateway?

Answer 14

The routing device that nodes on the network turn to for access to the outside world

Question 15

What is a subnet?

Answer 15

A smaller network within a larger network

Question 16

What is classful addressing?

Answer 16

IP addressing convention that adheres to network class distinctions

Question 17

What is class A IPv4 address?

Answer 17

First octet of the IPv4 address is the Network portion and the last 3 octets are the Host portion

Question 18

What is class B IPv4 address?

Answer 18

First 2 octets of the IPv4 address are the Network portion and the last 2 octets are the Host portion

Question 19

What is class C IPv4 address?

Answer 19

First 3 octets of the IPv4 address are the Network portion and the last octet is the Host portion

Question 20

What is a multicast?

Answer 20

One host sends messages to multiple hosts

Question 21

What is subnetting?

Answer 21

Segmenting networks within networks

Question 22

What is lease time?

Answer 22

Time limit on the validity of a DHCP issued IP address

Question 23

What is NAT?

Answer 23

Network Address Translation - Substitutes the private IP address with a public IP address to connect to other networks/Internet

Question 24

What is a DHCP scope?

Answer 24

The range of IP addresses

Question 25

What are the scope options?

Answer 25

Configuration options within the DHCP server

Question 26

What is lease time?

Answer 26

Time limit on the validity of a DHCP-issued IP address

Question 27

What is the IP/MAC/DHCP Reservation?

Answer 27

Reserved IP address based of MAC address

Question 28

What is Exclusion Range?

Answer 28

Range of IP address that is excluded but usually reserved for other devices

Question 29

What is PAT?

Answer 29

Port Addressing Translation - Assigns a separate TCP port to each session between a local host and an Internet host

Question 30

What is SNAT?

Answer 30

Source Network Address Translation - Gateway assigns the same public IP address to the host when connected to the internet

Question 31

What is DNAT?

Answer 31

Destination Network Address Translation - Host outside of the network address host inside the private network by a predefined public IP address that is assigned to the private host

Question 32

What is a Link?

Answer 32

LAN bounded by routers

Question 33

What are Neighbors?

Answer 33

2 or more nodes on the same link