COSC203 - PART |||

Question 1

This service is for logical communication between application processes.

Answer 1

Process-to-process communication

Question 2

This service is for communication for multiple applications on the same host

Answer 2

Multiplexing and deplexing

Question 3

This type of service ensures that production rate =< consumption rate.

Answer 3

Flow control (end devices)

Question 4

This type of service is for when there are too many senders, sending too fast.

Answer 4

Congestion control (routers)

Question 5

These actions are performed by a sender at the transport layer

Answer 5

A sender breaks the application into segments, and passes to the network layer.

Question 6

These actions are performed by the receiver at the transport layer.

Answer 6

Reassembles segments into messages and passes to the application layer.

Question 7

_______ at the ______ handles data from multiple sockets and adds a transport header

Answer 7

multiplexing, sender

Question 8

What does demultiplexing at the receiver involve?

Answer 8

The receiver will use header info to deliver received segments to the correct socket.

Question 9

A checksum has guaranteed _____

Answer 9

Integrity

Question 10

This is performed when setting up and terminating a TCP connection

Answer 10

3-way handshake

Question 11

When setting up a connection, a 3-way handshake involves agreeing on…

Answer 11

Connection parameters (including starting sequence numbers)

Question 12

This indicates that a TCP connection is being terminated

Answer 12

FIN + ACK

Question 13

For TCP flow control, the receiver “advertises” free ______ in the receive window field of the TCP header.

Answer 13

buffer space

Question 14

What is TCP congestion control?

Answer 14

Too many sources sending too much data for the network to handle

Question 15

How does AMID help with congestion control?

Answer 15

AMID allows senders to increase until packet loss (congestion) occurs, then decrease the sending rate on packet loss event.

Question 16

What is TCP slow start?

Answer 16

TCP slow start is part of the congestion control algorithms put in place by TCP to help control the amount of data flowing through to a network.

Question 17

T/F: UDP has handshaking between the sender and receiver.

Answer 17

False - each UDP segment is handled independently.

Question 18

Does UDP have flow and congestion control?

Answer 18

Absolutely not lmao

Question 19

This function moves packets from a router’s input link to an appropriate output link

Answer 19

Forwarding

Question 20

This function determines route taken by packets from source to destination

Answer 20

Routing

Question 21

The control plane is _____ and operates in a millisecond time frame

Answer 21

Software

Question 22

The data plan is _____ and operates in nanosecond timeframe

Answer 22

hardware

Question 23

IPv4 is an _______ host-to-host communication protocol

Answer 23

unreliable

Question 24

This is the connection between host/router and physical link

Answer 24

Interface

Question 25

An IPv4 is a ___-bit identifier associated with each host or router interface.

Answer 25

32

Question 26

This is a logical partition of an IP network into multiple, smaller network segments

Answer 26

Subnetting

Question 27

This is a 32-bit number that represents the network with 1s, and the host with 0s.

Answer 27

Netmask

Question 28

Large IP datagrams are ____ at routers

Answer 28

fragmented

Question 29

What are the three fields used for fragmentation for IP headers?

Answer 29

Identification, flag, fragment offset.

Question 30

This means that all devices in a local network share just one IPv4 address

Answer 30

Network Address Translation (NAT)

Question 31

This is a special purpose address that represents the localhost or loop-back

Answer 31

127.0.0.1

Question 32

What are two motivations for moving to IPv6?

Answer 32

Better support for security, IPv4 address exhaustion

Question 33

How many bits is an IPv6 address?

Answer 33

128 bits

Question 34

This method is for allocating IP addresses and IP routing

Answer 34

CIDR (Classless InterDomain Routing)

Question 35

What are the main differences between IPv4 and IPv6?

Answer 35

Address length, packet headers, no fragmentation at IPv6