Module 3

Question 1

What are the elements of any communication?

Answer 1

1) source(sender)
2) destination(receiver)
3) channel (media)

Question 2

What must a protocol do for successful message delivery?

Answer 2

1) An identified sender and receiver
2) Common language and grammar
3) speed and timing of delivery
4)confirmation or acknowledgement requirements

Question 3

What do protocols include?

Answer 3

1) Message encoding
2) Message formatting and encapsulation
3) Message size
4) message timing
5) message delivery options

Question 4

What is encoding?

Answer 4

The process of converting information into another acceptable form

Question 5

What is decoding?

Answer 5

Reverses the process to internet the information

Question 6

What is flow control?

Answer 6

The process of managing the rate of data transmission

Question 7

What is response timeout?

Answer 7

Network protocols that specify how long to wait for responses and what action to take if a timeout occurs

Question 8

What is access method?

Answer 8

Determines when someone can send a message

Question 9

What is unicast?

Answer 9

Information is being transmitted to a single end device

Question 10

What is multicast?

Answer 10

Information is being transmitted to a one or more end devices

Question 11

What is a broadcast?

Answer 11

Information is being transmitted to all end devices

Question 12

Define network communications protocols?

Answer 12

Enable 2 or more devices to communicate over one or more networks

Question 13

What are examples of network communications protocols?

Answer 13

IP, TCP and HTTP

Question 14

Define network security protocols?

Answer 14

Secure data to provide authentication, data integrity, and data encryption

Question 15

What are examples of network security protocols?

Answer 15

SSL, TLS and SSH

Question 16

What are routing protocols?

Answer 16

Enable routers to exchange route information, compare path information and then to select the best path to the destination network

Question 17

What are examples of routing protocols?

Answer 17

OSPF and BGP

Question 18

What are service discovery protocols?

Answer 18

Used to automatic detection of devices or services

Question 19

What are examples of service discovery protocols?

Answer 19

DHCP and DNS

Question 20

What is a protocol suite?

Answer 20

A group of inter-related protocols necessary to perform a communication function

Question 21

What are TCP/IP Application layer protocols?

Answer 21

HTTP, DNS, DHCP, FTP

Question 22

What are TCP/IP Transport layer protocols?

Answer 22

TCP and UDP

Question 23

What are TCP/IP internet layer protocols?

Answer 23

IP and ICMP

Question 24

Name TCP/IP Network Access layer protocols?

Answer 24

Ethernet, ARP and WLAN

Question 25

What are the 4 benefits of using a layered model?

Answer 25

1) assisting in protocol design 2) fostering competition because products vendors can work together 3) preventing technology or capability in one layer from affecting other layers above and below 4) providing a common language to describe networking functions and capabilities

Question 26

What are the 2 models used to describe network operations?

Answer 26

OSI and TCP/IP

Question 27

From 7 to 1, what are the OSI layers?

Answer 27

7) Application 6) Presentation 5) Session 4) Tranport 3) Network 2) Data Links 1) Physical

Question 28

What are the 4 layers of the TCP/IP model?

Answer 28

Application, Transport, Internet and Network Access

Question 29

What are 2 benefits of segmenting?

Answer 29

Increases speed and efficiency

Question 30

What is segmentation?

Answer 30

Dividing data into smaller, more manageable pieces

Question 31

What is sequencing?

Answer 31

Labeling segments for ordering and assembling the pieces when they arrive

Question 32

Define PDU

Answer 32

The form that a piece of data takes at any layer

Question 33

What are PDUs called in different layers?

Answer 33

*Application layer - Data *Transport layer - segment (TCP) or Datagram (UDP) *Network layer - Packet *Data Link Layer - Frame Physical Layer - Bits

Question 34

Encapsulation works from ______ to _________.

Answer 34

Top to Bottom

Question 35

What is used to identify the network portion of an IP address?

Answer 35

The subnet mask

Question 36

What is the left most portion of an IP address?

Answer 36

Network portio

Question 37

What is the part of the address that identifies a specific device?

Answer 37

Host portion

Question 38

What uses hexadecimal notation?

Answer 38

Source and destination MAC addresses in the Ethernet frame on the data link layer

Question 39

Where is an Ethernet frame sent when the sender and receiver of the IP are one different networks?

Answer 39

The default gateway or router