Module 12 - Gateways to other networks

Question 1

Which network device provides a gateway for hosts to communicate across different networks?

Answer 1

A router

Question 2

Which private address block is most commonly used in small home networks?

Answer 2

192.168.0.0/16 block (usually segmented into /24 to support 254 devices)

Question 2

Which network is referred to as the “inside” or “internal” network in router configurations?

Answer 2

The local network

Question 2

Which address must every host know to send traffic outside its local network?

Answer 2

The default gateway address

Question 2

Which process does a host use to resolve the MAC address of its default gateway?

Answer 2

ARP (Address Resolution Protocol)

Question 2

Which condition must be met for internal hosts to communicate with their default gateway?

Answer 2

Hosts must have IP addresses in the same network as the routers internal interface

Question 2

Which process does a host use to determine if a destination is on its local network or not?

Answer 2

Binary ANDing (comparing destination IP and host subnet mask)

Question 2

Which network is referred to as the “outside” or “external” network in a home router setup?

Answer 2

Internet facing interface

Question 2

Which private address block is best suited for large enterprises due to its large number of available subnets?

Answer 2

10.0.0.0/8 (has 24 host bits allowing around 16 million addresses)

Question 2

Which router component stores the relationship between private and public addresses in NAT?

Answer 2

NAT translation table

Question 2

Which process enables a device with a private IP address to communicate with public internet servers?

Answer 2

NAT (Network Address Translation)

Question 2

Which category of IPv4 addressing is intended for use only within an organization and not routable on the internet?

Answer 2

Private addressing

Question 3

Which subnet mask is typically associated with 192.168.0.0 networks in home environments?

Answer 3

255.255.255.0 /24

Question 3

Which three IPv4 address ranges are reserved for private networks?

Answer 3

10.0.0.0/8 - 10.255.255.255
172.16.00 - 172.31.255
192.168.0.0/16 - 192.168.255.255

Question 3

Which organization assigns public IP addresses for use across the global internet?

Answer 3

RIR’s (Regional Internet Registries)

Question 3

Which function allows multiple private devices to share a single public IP for internet access?

Answer 3

PAT (Port address translation)

Question 3

Which address is replaced when traffic exits a private network via NAT?

Answer 3

Private Source address