Network and Transport Layers - CH 5 (EXAM 1)

Question 1

What does the transport layer do?

Answer 1

links app and network layers

segmentation and reassembly

session management

end to end delivery of messages

Question 2

What is the network layer?

Answer 2

addresses and routes messages

Question 3

What is TCP/IP?

Answer 3

transport layer protocol
PDU = segment
160-192 bits overhead

Question 4

What is UDP?

Answer 4

transport layer protocol
PDU = segment
32-64 bits overhead
time sensitive situations

Question 5

What is the internet protocol?

Answer 5

network layer
IPv4 - most common 32 bit (20-24 bits overhead)
IPv6 - 128-bit address (320 bits overhead)

Question 6

Why is IPv4 important?

Answer 6

assigned large groups
32-bit address
giving out many numbers at a time

Question 7

Why is IPv6 important?

Answer 7

128-bit IP address

Question 8

What is the HTTP port standard?

Answer 8

TCP port 80

Question 9

What is the HTTPS port standard?

Answer 9

TCP port 443

Question 10

What is the FTP port standard?

Answer 10

TCP port 20/21

Question 11

What is the SMTP port standard?

Answer 11

TCP port 25

Question 12

What is the IMAP port standard?

Answer 12

TCP port 143

Question 13

What is the POP3 port standard?

Answer 13

TCP port 110

Question 14

What is the DNS port standard?

Answer 14

TCP/UDP port 53

Question 15

What is segmenting?

Answer 15

breaking large files into smaller ones