Chapter One

Question 1

Server

Answer 1

computer hardware or software that is used by multiple concurrent issuers or provides services to many users

Question 2

Client

Answer 2

a network device that remotely accesses a service on another computer through a network.

Question 3

End Device

Answer 3

either the source or destination of a message transmitted over a network

Question 4

Intermediary Device

Answer 4

a device that connects end devices to the network and can connect multiple individual networks to form an internetwork.

Question 5

Topology

Answer 5

the arrangement networking components or nodes. Examples include star, extended star, ring, and mesh

Question 6

Local-Area Networks (LAN’s)

Answer 6

a network infrastructure that provides access to users and end devices in a small geographic area, which is typically an enterprise, a home, or a small business network owned and managed by an individual or an IT department

Question 7

Small Office and Home Office (SOHO) Networks

Answer 7

a network in which computers can connect to a corporate network or access centralized, shared resources

Question 8

Wide-Area Networks (WAN’s)

Answer 8

a network infrastructure that provides access to other networks over a wide geographic area, which is typically owned and managed by a telecommunications service provider

Question 9

Internet

Answer 9

a network that combines enterprise networks, individual users, and ISP’s into a single global network

Question 10

Intranet

Answer 10

a private connection of LANs and WANs that belongs to an organization and that is designed to be accessible only by the organization’s members, employees, or others with authorization

Question 11

Extranet

Answer 11

part of a network that provides secure and safe access to individuals who work for a different organization but require access to the organization’s data

Question 12

Internet Service Provider (ISP)

Answer 12

a company that helps create the internet by providing connectivity to enterprises and individuals as well as interconnecting to other ISPs to create connectivity to all other ISPs

Question 13

Digital Subscriber Line (DSL)

Answer 13

an always-on internet service that provides high bandwidth and high availability. Voice and data signals are carried on different frequencies on the copper telephone wires. 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

Question 14

Cellular Connection

Answer 14

cellular internet access uses a cell phone network to connect. Wherever a user can get a cellular signal, the user can get cellular internet access

Question 15

Satellite Connection

Answer 15

internet access is provided using satellites and satellite dishes to serve areas that would otherwise have no Internet connectivity at all. A satellite dish requires a clear line of sight to the satellite

Question 16

Dialup Telephone Connection

Answer 16

an inexpensive communications 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 17

Fault Tolerant Network

Answer 17

a term for limiting the impact of a failure so that the fewest number of devices are affected and for the shortest time

Question 18

Converged Data Network

Answer 18

a network that aggregates various forms of traffic, such as voice, video, and data, on the same network infrastructure

Question 19

Scalable Network

Answer 19

a network that can expand quickly to support new users and applications

Question 20

Confidentiality

Answer 20

the state of ensuring that only intended and authorized recipients – individuals, processes, or devices – can access and read data. Confidentiality is accomplished by having a strong system for user authentication, enforcing passwords that are difficult to guess, and requiring users to change passwords frequently. Encrypting data so that only the intended recipient can read is also part of confidentiality

Question 21

Quality of Service (QoS)

Answer 21

a control mechanism that can provide different priorities to different users or data flows or guarantee a certain level of performance to a data flow in accordance with requests from the application program

Question 22

Integrity

Answer 22

the assurance that information has not been altered in transmission from origin to destination. Data integrity can be compromised when information has been corrupted – willfully or accidentally. Data integrity is made possible by requiring validation of the sender as well as using mechanisms to validate that the packet has not changed during transmission

Question 23

Availability

Answer 23

the assurance of timely and reliable access to data services for authorized users. Network firewall devices, along with desktop and server anti-virus software, can ensure system reliability and robustness in detecting, repelling, and coping with breaches of network security. Building fully redundant network infrastructures with few single points of failure can reduce the impact of these threats

Question 24

Bring Your Own Device (BYOD)

Answer 24

a policy that allows end users to use personal tools to access information and communicate within the network or on another network

Question 25

Cloud Computing

Answer 25

computing resources (hardware and software) delivered as a service over a network. A company uses the hardware and software in the cloud, and a service fee is charged

Question 26

Powerline Networking

Answer 26

an emerging trend for home networking that uses existing electrical wiring to connect devices

Question 27

Wireless Internet Service Provider

Answer 27

an ISP that connects subscribers to a designated access point or hotspot using wireless technologies similar to those found in home wireless local-area networks.

Question 28

During a routine inspection, a technician discovered that software that was installed on a computer was secretly collecting data about websites that were visited by users of the computer. What type of threat is affecting this computer? A. DoS Attack B. identity theft C. Spyware D. zero-day attack

Answer 28

C. Spyware is a type of software that is installed on a user's device to collect information about the user.

Question 29

Which term refers to a network that provides secure access to the corporate offices for suppliers, customes, and collaborators? A. internet B. intranet C. extranet D. extended net

Answer 29

C. An organization may use an extranet to provide secure and safe access to individuals who work for a different organization but require access to the organization's data.

Question 30

A large corporation has modified its network to allow users to access network resources from their personal laptops and smatphones. Which networking trend does this describe? A. cloud computing B. online collaboration C. BYOD D. video conferencing

Answer 30

C. BYOD gives end users the freedom to use personal devices to access information and communicate across a business or campus network.

Question 31

What is an ISP? a. it is a standards body that develops cabling and wireing standards for networking b. it is a protocol that establishes how computers in a local network communicate c. it is an organization that enables individuals and businesses to connect to the internet d. it is a networking device that combines the functionality of several different networking devices into one

Answer 31

C. home users, remote workers, and small offices typically require a connection to an ISP (internet service provider) to access the internet

Question 32

For which of the following would the user of a WISP be reccomended? a. an internet cafe in a city b. a farm in a rural area without wired broadband access c. any home with multiple wireless devices d. an apartment in a building with cable access to the internet

Answer 32

B. a wireless internet service provider (WISP) id an ISP that connects subscribers to a designated access point or hotspot using wireless technologies similar to those in home wireless local-area networks (WLAN's). WISPs are most commonly found in rural environments where DSL or cable services are not available.

Question 33

What characteristics of a network enables it to quickly grow to support new users and applications without impacting the performance of the service being delivered to existing users? a. reliability b. scalability c. quality of service d. accessibility

Answer 33

B. a scalable network expands quickly to support new users and applications

Question 34

A college is building a new dormitory on its campus. Workers are digging in the ground to install a new water pipe for the dormitory. A worker accidentally damages a fiber-optic cable that connects two of the existing dormitories to the campus data-center. Although the cable has been cut, students in the dormitories experience only a very short interruption of network services. What characteristic of the network is described here? a. quality of service b. scalability c. security d. fault tolerance e. integrity

Answer 34

D. a fault-tolerant network limits the number of affected devices during a failure. It is built to allow quick recovery when such a failure occurs.

Question 35

What are two-characteristics of a scalable network? (choose two) a. easily overloaded with increased traffic b. grows in size without impacting existing users c. is not as reliable as a small network d. suitable for modular devices that allow for expansion e. offers limited number of applications

Answer 35

B and D. A scalable network expands quickly to support new users and applications. It does this without degrading the performance of services that are being accessed by existing users. Scalability is typically required in networks with wireless and mobile devices.

Question 36

Which device performs the function of determining the path that messages should take through internetworks? a. a router b. a firewall c. a web server d. a DSL modem

Answer 36

A. a router is a device that interconnects multiple networks and is responsible for forwarding messages between them

Question 37

What type of network must a home user access in order to do online shopping? a. an intranet b. the internet c. an extranet d. a local area network

Answer 37

D. BYOD gives end users the freedom to use personal devices to access information and communicate across a business or campus network. The trend has been to allow employees access to internal network services and information from personal devices

Question 38

Which two internet connection options do not require that physical cables be run to a building? (choose two) a. DSL b. cellular c. satellite d. dialup e. dedicated leased line

Answer 38

B and C. Cellular and satellite communications are wireless technologies that do not require physical cables.

Question 39

An employee wants to access the network of an organization remotely, in the safest possible way. What network feature would allow an employee to gain secure remote access to a company network? a. ACL b. IPS C. VPN D. BYOD

Answer 39

C. A virtual private network (VPN) provides secure access to an organization's network for remote workers

Question 40

What is the internet? a. it is a network based on Ethernet techonology. b. it provides network access for mobile devices c. it provides connections through interconnected global networks d. it is a private network for an organization with LAN and WAN connections

Answer 40

C. the internet is a worldwide collection of interconnected networks (internetworks, or internet for short)

Question 41

What are two functions of end devices on a network? (choose two) a. they originate the data that flows through the network b. they direct data over alternate paths in the event of a link failure c. they filter the flow of data to enhance security d. they are the interface between humans and the communications network e. they provide the channel over which the network message travels

Answer 41

A and D. Users interface with a network using an end device. An end device is wither the source or destination of a message transmitted over the network.