Module H4: Transport Layer Protocol

Question 1

What is the size range for a tcp header? (Use format xxxx - xxxx)

Question 2

What flag is used to acknowledge packets were received?

Answer 2

ack

Question 3

What flag is used to immediately forward data even if more data is coming?

Answer 3

URG

Question 4

What flag is used to terminate the connection if the sender suspects something is off?

Answer 4

RST

Question 5

What flag is used to terminate the connection?

Answer 5

FIN

Question 6

What is a lightweight protocol that works on top of IP?

Answer 6

udp

Question 7

How many bytes is a UDP header?

• 4
• 2
• 16
• 8
• 1

Answer 7

8

Question 8

What do the first four bytes of the UDP header store?

• Buffer Space
• Window Size
• Port Numbers
• MTU
• Header Length

Answer 8

Port Numbers

Question 9

TCP supports Broadcasting.

True / False

Answer 9

False

Question 10

TCP is _____ oriented.

• Encryption
• Connection
• Connection-less
• Port
• Protocol

Answer 10

Connection

Question 11

UDP is ______ oriented.

• Encryption
• Connection
• Connection-less
• Port
• Protocol

Answer 11

Connection-less

Question 12

DNS, DHCP and VoIP all employ what protocol?

• TCP
• UDP
• ICMP
• DNS

Answer 12

UDP

Question 13

Sequencing occurs in UDP\

True / False

Answer 13

False

Question 14

What do TCP and UDP use in order to find target applications?

• Port Numbers
• Magic
• Key Coding
• Sequence Numbers

Answer 14

Port Numbers

Question 15

What does UDP rely on in order to perform segmentation?

Answer 15

application

Question 16

What is assigned by the host to each TCP packet?

• Bigaole
• Mac Address Translation
• Port Reference ID
• Sequence Number

Answer 16

Sequence Number

Question 17

What are the primary information units on the internet?

• Connections
• Protocols
• Datagrams
• Ports

Answer 17

Datagrams

Question 18

What is the range of well known port numbers? (Use format: xxx - xxx)

• 0-1024
• 1-1024
• 0-1023
• 1-1023
• 20-1024
• 0-65535
• 0-65536
• 1-65536

Answer 18

0-1023

Question 19

Which layer does the transport layer receive packets from?

• Network layer / Layer 3
• Transport Layer / Layer 4
• Session Layer / Layer 5
• Data Link Layer / Layer 2

Answer 19

Network

Question 20

A network IP address and a port address together are considered what?

• GOSIP
• Kludge
• Socket
• Full-Duplex
• Jacket

Answer 20

Socket

Question 21

When chunks of data are gathered and attached to header information in order to create segments, what is this process called?

• Segmentation
• Guard Band
• Multiplexing
• Oscillation

Answer 21

Multiplexing

Question 22

When a received packet is directed to the proper IP address and port, what is this process called?

Answer 22

demultiplexing

Question 23

What is it called when many packets are sent without first waiting for an acknowledgement?

Answer 23

Pipelining

Question 24

What flag is used to signal the data needs to be immediately sent?

Answer 24

PSH

Question 25

What is it called when the receiver in a TCP connection needs to control how much data is sent at a time? * Throttle * Load Control * Slewing Rate * Flow control

Answer 25

Flow Control

Question 26

What is byte 0 on the TCP header?

Answer 26

source port

Question 27

What is the BPF to filter for “Destination Port” in the TCP header?

Answer 27

tcp[2:2]

Question 28

What is the BPF to filter for TCP flags in the TCP header?

Answer 28

tcp[13]

Question 29

What is the BPF to filter for “Source Port” in the UDP header?

Answer 29

udp[0:2]

Question 30

What is the BPF using tcpdump to filter for the SYN flag?

Answer 30

tcp[13]=2

Question 31

What is the BPF using TCP dump to filter for the SYN and ACK flag? Enter syntax only, from "tcpdump" to the end of the BPF filter with spaces and single or double quotations.

Answer 31

tcpdump ‘tcp[13]=18’

Question 32

Using the TCP Header, what field starts at byte 2? * Source Port * Source Address * Destination Port * Destination Address

Answer 32

Destination Port

Question 33

Bit-wise masking is a must in order to filter for TCP Flags? True False

Answer 33

True