Protocols and Models

Question 1

Converged Network

Answer 1

One port RJ-45 for multiple uses (VoIP, Internet, TV, Video)

Question 2

Network requirements (4)

Answer 2

• Coverage
• Bandwidth (Perfomance)
• Reliability
• Scalability

Question 3

What is an extranet?

Answer 3

Secure network that allows access to individuals from different organizations to an organization’s data.

Question 4

Example of an extranet for hospitals

Answer 4

A hospital can provide a booking system to doctors for making appointments for their patients.

Question 5

Fill in the blank: An extranet allows _______ access to an organization’s data.

Answer 5

[secure and safe]

Question 6

Network Trends:

Answer 6

• BYOD
• Online Collaboration
• Video Communication
• Cloud Computing
• Smart Home / IoT
• Powerline Networking

Question 7

Most important Network Protocol Suite

Answer 7

TCP/IP

Question 8

Example of Peer-to-Peer

Answer 8

Printer is directly connected to computer via USB and this shares the printer on the network.

Question 9

Peer-to-Peer Characteristic

Answer 9

Device is client and server at the same time

Question 10

Advantages of peer-to-peer

Answer 10

• easy to setup
• less complex
• lower cost (dedicated servers and network devices may not be required)
• can be used for simple tasks such as transferring files and sharing printers

Question 11

Disadvantage of peer-to-peer

Answer 11

• No centralized administration
• not as secure
• not scalable
• slower device performance (due to being client and server)

Question 12

What is a socket?

Answer 12

IP and Port number

Question 13

Physical Topology

Answer 13

Building plans, where are the devices located physically

Question 14

Logical Topology

Answer 14

Logical plan, networks and devices which are part of it.

Question 15

WAN connects…

Answer 15

multiple LANs

Question 16

WAN is…

Answer 16

the “Internet” and administered by multiple service providers

Question 17

IETF

Answer 17

Internet Engineering Task Force

Question 18

ICANN

Answer 18

Internet Corporation for Assigned Names and Numbers

Question 19

IAB

Answer 19

Internet Architecture Board

Question 20

Types of Internet connections

Answer 20

• DSL (copper telephone lines)
• Cable (coaxial cable)
• Cellular
• Satellite
• Dial-Up Telephone

Question 21

4 characteristics of a reliable network

Answer 21

• Fault tolerance
• scalability
• Quality of Service (QoS)
• Security

Question 22

Protocol Types

Answer 22

• Network Communication (IP, TCP, HTTP)
• Network Security (SSH, SSL, TLS)
• Routing Protocols (BGP, OSPF)
• Service Discovery (DHCP, DNS)

Question 23

Encapsulation

Answer 23

process of adding new information to PDU.

Question 24

De-Encapsulation

Answer 24

process of unpacking to PDU

Question 25

Standard for WLAN

Answer 25

IEEE 802.11

Question 26

Standard for Network Interface Cards (NIC)

Answer 26

IEEE 802.3

Question 27

Name of PDU in Layer 5-7

Answer 27

Data (stream)

Question 28

Name of PDU in Layer 4

Answer 28

Segment

Question 29

Name of PDU in Layer 3

Answer 29

Packet

Question 30

Name of PDU in Layer 2

Answer 30

Frame

Question 31

Name of PDU in Layer 1

Answer 31

Bit

Question 32

Standards are defined by

Answer 32

Organizations like IEEE

Question 33

What is a protocol?

Answer 33

Part of a software, which is built op on certain rules to ensure compability