ASSORTED

Question 1

What is the difference between a web browser and a search engine?

Answer 1

: A browser is a piece of software that retrieves and displays web pages; a search engine is a website that helps people find web pages from other websites

Question 2

What does the application layer provide?

Answer 2

the interface between the applications we use to communicate and the underlying network over which our messages are transmitted

Question 3

What is the definition of the term network for this course?
data or information networks capable of carrying many different types of communications, including traditional computer data, interactive voice, video, and entertainment products.
What would happen to the network if a message was sent as one massive continuous stream of bits?

Answer 3

no other device would be able to send or receive messages on the same network while this data transfer was in progress

Question 4

What is multiplexing?

Answer 4

process used to interleave the pieces of separate conversations together on the network

Question 5

List examples of intermediary devices.

Answer 5

Network Access Devices (Hubs, switches, and wireless access points)
Internetworking Devices (routers)
Communication Servers and Modems
Security Devices (firewalls)

Question 6

List examples of process that intermediary devices perform

Answer 6

Regenerate and retransmit data signals
Maintain information about what pathways exist through the network and internetwork
Notify other devices of errors and communication failures
Direct data along alternate pathways when there is a link failure
Classify and direct messages according to QoS priorities
Permit or deny the flow of data, based on security settings

Question 7

What are the 3 primary types of media used in modern networks?

Answer 7

Metallic wires within cables
Glass or plastic fibers (fiber optic cable)
Wireless transmission

Question 8

What criteria should be used to select network media?

Answer 8

The distance the media can successfully carry a signal.
The environment in which the media is to be installed.
The amount of data and the speed at which it must be transmitted.
The cost of the media and installation

Question 9

Define a physical port

Answer 9

A connector or outlet on a networking device where the media is connected to a host or other networking device

Question 10

Define an interface

Answer 10

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

Question 11

Which device decapsulates the frame at the edge of a network?

Answer 11

ROUTER

Question 12

What 6 things do protocols define?

Answer 12

1. processes on either end of the communication
2. types of messages
3. syntax of messages
4. meaning of any informational fields
5. how messages are sent and the expected response
6. interaction with the nextlower layer

Question 13

What is SMB (Server Message Block)?

Answer 13

the structure of shared network resources, such as directories, files, printers, and serial ports

Question 14

What does the Telenet application provide?

Answer 14

provides a standard method of emulating text-based terminal devices over the data network.

Question 15

What is the difference between physical and logical topology diagrams?

Answer 15

Physical topology diagrams illustrate the physical location of intermediary devices and cable installation while Logical topology diagrams illustrate devices, ports, and the addressing scheme of the network.

Question 16

What is a SOHO network?

Answer 16

Small Office and Home Office Networks allows computers in a home office or a remote office to connect to a corporate network, or access centralized, shared resources.

Question 17

What factors influence the nature of a network infrastructure?

Answer 17

Size of the area covered
Number of users connected
Number and types of services available
Area of responsibility

Question 18

Which organizations were developed to help maintain the structure and standardization of internet protocols and processes?

Answer 18

These organizations include the Internet Engineering Task Force (IETF), Internet Corporation for Assigned Names and Numbers (ICANN), and the Internet Architecture Board (IAB), plus many others.

Question 19

List common connection options for small office and home users

Answer 19

Cable - Typically offered by cable television service providers, the internet data signal transmits on the same cable that delivers cable television. It provides a high bandwidth, high availability, and an always-on connection to the internet.
DSL - Digital Subscriber Lines also provide high bandwidth, high availability, and an always-on connection to the internet. DSL runs over a telephone line. In general, small office and home office users connect using Asymmetrical DSL (ADSL), which means that the download speed is faster than the upload speed.
Cellular - Cellular internet access uses a cell phone network to connect. Wherever you can get a cellular signal, you can get cellular internet access. Performance is limited by the capabilities of the phone and the cell tower to which it is connected.
Satellite - The availability of satellite internet access is a benefit in those areas that would otherwise have no internet connectivity at all. Satellite dishes require a clear line of sight to the satellite.
Dial-up Telephone - An inexpensive option that uses any phone line and a modem. The low bandwidth provided by a dial-up modem connection is not sufficient for large data transfer, although it is useful for mobile access while traveling.

Question 20

List common connection options for businesses

Answer 20

Dedicated Leased Line - Leased lines are reserved circuits within the service provider’s network that connect geographically separated offices for private voice and/or data networking. The circuits are rented at a monthly or yearly rate.
Metro Ethernet - This is sometimes known as Ethernet WAN. In this module, we will refer to it as Metro Ethernet. Metro ethernets extend LAN access technology into the WAN. Ethernet is a LAN technology you will learn about in a later module.
Business DSL - Business DSL is available in various formats. A popular choice is Symmetric Digital Subscriber Line (SDSL) which is similar to the consumer version of DSL but provides uploads and downloads at the same high speeds.
Satellite - Satellite service can provide a connection when a wired solution is not available.

Question 21

Describe traditional separated networks

Answer 21

Separate networks cannot communicate with each other. Each network uses different technologies to carry the communication signal. Each network has its own set of rules and standards to ensure successful communication. Multiple services ran on multiple networks.

Question 22

Describe the converged network

Answer 22

Separate data, telephone, and video networks converge. Unlike dedicated networks, converged networks are capable of delivering data, voice, and video between many different types of devices over the same network infrastructure. This network infrastructure uses the same set of rules, agreements, and implementation standards. Converged data networks carry multiple services on one network.