Networks 3

Question 1

What are the 2 components of a network/logical socket?

Answer 1

IP

Port

Question 2

Give a valid example of a source socket and a destination socket.

Answer 2

Client: 69.250.243.147(IP):49152(ephemeral port)

Server: 8.8.8.8(IP):443(well-known port)

Question 3

What are the four “network numbers” a client computer needs to connect to a network and browse the Internet?

Answer 3

IP
Subnet
Gateway IP
DNS server(s)

Question 4

Name the two methodologies computers are assigned the “network numbers” needed to access a network.

Answer 4

Static (manual)

Automatic (DHCP)

Question 5

What is DHCP?

Answer 5

Automatic Network configuration

Question 6

What Transport Layer Protocol is used by DHCP?

Answer 6

UDP

Question 7

What ports are used by DHCP?

Answer 7

68/67

Question 8

How is DORA related to DHCP?

Answer 8

Discover – client
Offer – server
Request – client
Acknowledge – server

Question 9

What layer of the OSI Model does ARP exist at?

Answer 9

2

Question 10

Describe how ARP is used by a switch.

Answer 10

ARP/Switch Table associates MAC (and IP) to a physical port