Chapter 1

Question 0

End devices (host devices)

Answer 0

Physical thing at the end of a network. Can be a client or server or both. All user devices connected to the network that participate in network communication.

Question 1

Define “Internet.”

Answer 1

A network of networks. Made of an interconnection of private and public networks.

Question 2

Advantages of peer to peer networking.

Answer 2

• Easy to set up
• less complexity (simpler)
• lower cost , since network devices and dedicated servers may not be required.
• can be used for simple takes, transferring files and sharing printers

Question 3

Disadvantages to peer to peer networking

Answer 3

• NO Centralized administration
• not as secure
• Not scalable
• all devices may act as both clients AND servers, can slow performance.

Question 4

Tell me shit about clients and servers

Answer 4

Clients request information from servers.

Clients can be web browsers, email clients, and they access an e-mail server or web server. Got it?

Question 5

What are the three categories of network components?

Answer 5

• Devices
• Media (physical wires that carry electrical connections)
• services and processes

Question 6

Intermediary Devices.

Answer 6

• Provide connectivity and work behind the scenes to ensure that data flows across the network.
• connect individual hosts to network, and networks to other networks to make an internetwork
• manage data in network
• directs data path, does not change actual data content

Question 7

Examples of intermediary devices.

Answer 7

• Network Access devices (switches, wireless access points)
• Internetworking devices (routers)
• Security devices (firewalls)

Question 8

Define “Medium.”

Answer 8

The channel over which a message flows from source to destination.

Question 9

Which form of “media” transfers signals furthest and fastest?

Answer 9

Fiber optic.

As opposed to Copper wire and wireless media

Question 10

What is a Topology?

Answer 10

A visual representation of a network.

Question 11

Process running on intermediary devices can:

Answer 11

• regenerate and retransmit data signals.
• maintain info about what pathways exist through the network/internetwork
• notify devices of errors/failures
• direct data along alternate pathways when there’s a link failure
• Permit or deny the flow of data based on security settings

Question 12

What is a Network Interface Card (NIC)?

Answer 12

Provides physical connection to the network at the PC (or other host device). The media (cable) connecting to the PC to the network device plugs directly into the NIC.

Question 13

Physical port.

Answer 13

Connector or outlet on a networking device where media is connected.

Question 14

Interface.

Answer 14

Specialized ports on an internetworking device, that connect to individual networks.

Question 15

Types of networks (LAN):

Answer 15

• LAN: Local Area Network- network in a small geographic area.
• WAN: Wide Area Network- A network over a wide geographic area.
• MAN: Metropolitan Area Network- larger than LAN, smaller than WAN, city-sized.
• WLAN: Wireless LAN- wireless network in small area
• SAN: Storage Area Network- network infrastructure designed to support file servers and provide data storage, retrieval, and replication.

Question 16

What is the Intranet. (Not Internet)

Answer 16

A companies set of LANs for employees.

Question 17

What is the extranet?

Answer 17

Limited access to the intranet (not Internet) provided to customers and suppliers (etc.) by a company.

Question 18

What is scalability?

Answer 18

The ability of a network to grow/shrink with little/no burden on the network.

Question 19

What is fault tolerance?

Answer 19

Ability of a network to recover from failure.

Question 20

What is network architecture?

Answer 20

The technologies that support the infrastructure and the programmed services and rules or protocols that move passages across the network.

Basically the technologies that support the design of the whole network.

Question 21

Packet-switched networks.

Answer 21

Provide many paths for communication.

Question 22

Ways to provide Quality of service. (QoS)

Answer 22

• Using Queues to prioritize communication.
• increase priority services like telephone/video
• decrease priority/block unwanted activity

Question 23

Network Infrastructure Security:

Answer 23

Physical securing of devices that provide network connectivity, and preventing unauthorized access to the software that resides on the devices.

Question 24

Information Security:

Answer 24

Protecting the information contained within the packets being transmitted over the network and stored on network attached devices.

Question 25

BYOD

Answer 25

Bring your own device

Question 26

Cloud computing:

Answer 26

Use of hardware and software that is delivered as a service over a network.

Question 27

Four types of “clouds.”

Answer 27

Public- available to everyone.

Private- intended for organizations, like government. Strict security.

Custom- built to meet the needs of a specific industry, (healthcare, media, etc.). Can be private or public.

Hybrid- made of two or more clouds

Question 28

Data Center:

Answer 28

Facility used to house computer systems and associated components.

Question 29

Wireless Internet Service Provider:

Answer 29

ISP that connects subscribers to a designated hot spot using wireless devices, such as ones found in WLANs.

Question 30

Wireless broadband:

Answer 30

Uses the same cellular technology used to access the Internet with a smart phone or tablet.

Question 31

External network threats:

Answer 31

Viruses, spyware, hacking, identity theft, data interception/theft, etc.

Question 32

Network security components/solutions:

Answer 32

Antivirus and antispyware

Firewall

Access control lists etc.