5.1 - 5.2 - Transport and Network Layer Protocols

Question 1

Links the application software in the application layer with the network and is responsible for the end-to-end delivery of message

Answer 1

Transport Layer

Question 2

Accepts outgoing messages from the application layer and segments them for transmission

Answer 2

Transport Layer

Question 3

Protocol Data Unit (PDU) at the transport layer is segment

Answer 3

Transport Layer

Question 4

Takes the messages from the transport layer and routes them through the network by selecting the best path from computer to computer

Answer 4

Network Layer

Question 5

First the application layer produces a Simple Mail Transfer Protocol (SMTP) packet that is split into two smaller TCP segments by the _______ layer

Answer 5

transport

Question 6

Second, each segment from the transport layer are turned into packets in the __________ layer

Answer 6

network

Question 7

Third, the __________ layer adds Ethernet Frame and instructs the physical layer hardware when to transmit

Answer 7

data link

Question 8

There are different transport/network layer protocols but one family of protocols, the ____________________, dominates

Answer 8

Internet Protocol Suite

Question 9

Developed for the US Department of Defence’s Advanced Research Project Agency network (ARPANET) by Vinton Cerf and Bob Kahn (1974)

Answer 9

Transmission Control Protocol/Internet Protocol (TCP/IP)

Question 10

The transport layer protocol that links the application layer to the network layer

Answer 10

TCP

Question 11

The network layer protocol and performs addressing and routing

Answer 11

IP

Question 12

A typical TCP segment has a ______-bit header (24 bytes) of control information

Answer 12

192

Question 13

Among other fields, TCP contains the source and destination _______________

Answer 13

port identifier

Question 14

The _____________ port tells the TCP software at the destination to which application layer program the application layer packet should be sent

Answer 14

destination

Question 15

The __________ port tells the receiver which application layer program the packet is from

Answer 15

source

Question 16

The TCP segment also provides a _________________ so that the TCP software at the destination can assemble the segments into the correct order and make sure that no segments have been lost

Answer 16

sequence number

Question 17

1. Connection-oriented
2. Reliable delivery
3. Ordered data reconstruction
4. Flow control
5. Stateful protocol

Answer 17

TCP’s characteristics

Question 18

Creating a session between source and destination nodes

Answer 18

Connection-oriented

Question 19

Retransmitting lost or corrupt data

Answer 19

Reliable delivery

Question 20

Numbering and sequencing of segments

Answer 20

Ordered data reconstruction

Question 21

Regulating the amount of data transmitted

Answer 21

Flow control

Question 22

Keeping track of the session

Answer 22

Stateful protocol

Question 23

Applications/protocols that use TCP:

Answer 23

1. HTTP
2. FTP
3. SMTP
4. Telnet

Question 24

The Internet Protocol Suite has a second type of transport layer protocol, the __________________

Answer 24

User Datagram Protocol (UDP)

Question 25

UDP PDUs are called __________

Answer 25

datagrams

Question 26

UDP is used when the sender needs to send a single small __________ to the receiver

Answer 26

packet

Question 27

When there is only one small packet to be sent, the transport layer doesn't need to worry about __________ or reassembling

Answer 27

segmenting

Question 28

But unlike TCP, UDP doesn't check for __________________ (unreliable) --- resending of datagrams might be necessary

Answer 28

lost messages

Question 29

1. Connectionless 2. Unreliable delivery 3. No ordered data reconstruction 4. No flow control 5. Stateless protocol

Answer 29

UDP's characteristics:

Question 30

Applications/protocols that use UDP:

Answer 30

1. DHCP 2. DNS 3. SNMP 4. TFTP 5. VoIP 6. Video Streaming

Question 31

The __________ (IP) is the network layer protocol

Answer 31

internet protocol

Question 32

Network layer PDUs are called __________

Answer 32

packets

Question 33

Two forms of IP are currently in use (__________ and __________)

Answer 33

IPv4...IPv6

Question 34

- Provides reliable delivery that all of the data arrives at the destination - Uses acknowledges delivery and other processes to ensure delivery - Makes larger demands on the network -- more overhead, thus, slower

Answer 34

Transmission Control Protocol (TCP)

Question 35

- Provides just the basic functions for delivery -- no reliability - less overhead

Answer 35

User Data Protocol (UDP)

Question 36

Three unique functions provided by the __________: 1. Linking application layer to network layer 2. Segmenting 3. Session management

Answer 36

Transport Layer

Question 38

With TCP, each application layer software package has a unique __________

Answer 38

port address

Question 39

Port addresses can be any ____-bit (2 byte) number assigned to a service

Answer 39

16

Question 40

__________ means to take one outgoing message from the application layer and break it into a set of smaller segments

Answer 40

Segmenting

Question 41

__________ also means to take the incoming set of smaller segments from the network layer and reassemble them for the application layer

Answer 41

Segmenting

Question 42

A __________ can be thought of as a conversation between two computers

Answer 42

session