Introduction to Networks (Version 6.00) - ITN Chapter 1

Which statement describes the use of powerline networking technology?

A device connects to an existing home LAN using an adapter and an existing electrical outlet. Powerline networking adds the ability to connect a device to the network using an adapter wherever there is an electrical outlet.​ The network uses existing electrical wiring to send data. It is not a replacement for physical cabling, but it can add functionality in places where wireless access points cannot be used or cannot reach devices.​

Which two statements describe intermediary devices? (Choose two.)

Intermediary devices direct the path of the data. & Intermediary devices connect individual hosts to the network. Applications on end devices generate data, alter data content, and are responsible for initiating the encapsulation process.

What is the Internet?

It provides connections through interconnected global networks. The Internet provides global connections that enable networked devices (workstations and mobile devices) with different network technologies, such as Ethernet, DSL/cable, and serial connections, to communicate. A private network for an organization with LAN and WAN connections is an intranet.

Which tool provides real-time video and audio communication over the Internet so that businesses can conduct corporate meetings with participants from several remote locations?

TelePresence

What are two functions of end devices on a network? (Choose two.)

They originate the data that flows through the network. & They are the interface between humans and the communication network. End devices originate the data that flows through the network. Intermediary devices direct data over alternate paths in the event of link failures and filter the flow of data to enhance security. Network media provide the channel through which network messages travel.

Which expression accurately defines the term bandwidth?

a measure of the data carrying capacity of the media A method of limiting the impact of a hardware or software failure is fault tolerance. A measure of the data carrying capacity is bandwidth. A set of techniques to manage the utilization of network resources is QoS. A state where the demand on the network resources exceeds the available capacity is called congestion.

Which device performs the function of determining the path that messages should take through internetworks?

a router A router is used to determine the path that the messages should take through the network. A firewall is used to filter incoming and outgoing traffic. A DSL modem is used to provide Internet connection for a home or an organization.

Which description correctly defines a converged network?

a single network channel capable of delivering multiple communication forms

Which expression accurately defines the term congestion?

a state where the demand on the network resources exceeds the available capacity

What security violation would cause the most amount of damage to the life of a home user?

capturing of personal data that leads to identity theft On a personal PC, denial of service to servers, worms and viruses, and spyware producing spam emails can be annoying, invasive, and frustrating. However, identity theft can be devastating and life altering. Security solutions should be in place on all personal devices to protect against this type of threat.

Which two Internet connection options do not require that physical cables be run to the building? (Choose two.)

cellular & satellite Cellular connectivity requires the use of the cell phone network. Satellite connectivity is often used where physical cabling is not available outside the home or business.

A ________ network is capable of delivering voice, video, text, and graphics over the same communication channels.

converged When one network is used for all types of communication such as voice, video, text, and graphics, the network is referred to as a converged network.

A network administrator is implementing a policy that requires strong, complex passwords. Which data protection goal does this policy support?

data confidentiality

Match the definition to the security goal. (Not all options are used.)

ensuring confidentiality = only the intended recipients can access and read the data maintaining integrity = the assurance that the information has not been altered during transmission ensuring availability = the assurance of timely and reliable access to data Data integrity verifies that the data has not been altered on the trip between the sender and the receiver. A field calculated by the sender is recalculated and verified to be the same by the receiver. Passwords and authorization maintain control over who has access to personal data. Redundant devices and links attempt to provide 99.999% availability to users. Integrity is made possible by requiring validation of the sender, not the destination. VPNs are not the only secure method by which data can be transferred confidentially.

Match each characteristic to its corresponding internet conectivity type. (Not all options are used)

high bandwidth connection that runs over telephone line = DSL typically has very low bandwidth = Dialup Telephone not suited for heavily wooded areas = Satellite uses coaxial cable as a medium = Cable DSL is an always-on, high bandwidth connection that runs over telephone lines. Cable uses the same coaxial cable that carries television signals into the home to provide Internet access. Dialup telephone is much slower than either DSL or cable, but is the least expensive option for home users because it can use any telephone line and a simple modem. Satellite requires a clear line of sight and is affected by trees and other obstructions. None of these typical home options use dedicated leased lines such as T1/E1 and T3/E3.

A user is implementing security on a small office network. Which two actions would provide the minimum security requirements for this network? (Choose two.)

implementing a firewall installing antivirus software Technically complex security measures such as intrusion prevention and intrusion prevention systems are usually associated with business networks rather than home networks. Installing antivirus software, antimalware software, and implementing a firewall will usually be the minimum requirements for home networks. Installing a home wireless network will not improve network security, and will require further security actions to be taken.

What type of network must a home user access in order to do online shopping?

the Internet

What two criteria are used to help select network media? (Choose two.)

the distance the media can successfully carry a signal & the environment where the media is to be installed

What two criteria are used to help select a network medium from various network media? (Choose two.)

the distance the selected medium can successfully carry a signal & the environment where the selected medium is to be installed Criteria for choosing a network medium are the distance the selected medium can successfully carry a signal, the environment in which the selected medium is to be installed, the amount of data and the speed at which the data must be transmitted, and the cost of the medium and its installation.

Which area of the network would a college IT staff most likely have to redesign as a direct result of many students bringing their own tablets and smartphones to school to access school resources?

wireless LAN An extranet is a network area where people or corporate partners external to the company access data. An intranet simply describes the network area that is normally accessed only by internal personnel. The wired LAN is affected by BYODs (bring your own devices) when the devices attach to the wired network. A college wireless LAN is most likely used by the tablet and smartphone. A wireless WAN would more likely be used by college students to access their cell provider network.

Refer to the exhibit. Which set of devices contains only intermediary devices?

A, B, D, G

Which statement describes a characteristic of cloud computing?

Applications can be accessed over the Internet by individual users or businesses using any device, anywhere in the world. Cloud computing allows users to access applications, back up and store files, and perform tasks without needing additional software or servers. Cloud users access resources through subscription-based or pay-per-use services, in real time, using nothing more than a web browser.

Fill in the blank. The acronym ____ refers to the policy that allows employees to use their personal devices in the business office to access the network and other resources.

BYOD Bring Your Own Device

Which two Internet solutions provide an always-on, high-bandwidth connection to computers on a LAN? (Choose two.) Which two Internet solutions provide an always-on, high-bandwidth connection to computers on a LAN? (Choose two.)

DSL & Cable

Which two connection options provide an always-on, high-bandwidth Internet connection to computers in a home office? (Choose two.)

DSL & Cable Cable and DSL both provide high bandwidth, an always on connection, and an Ethernet connection to a host computer or LAN.

What is a characteristic of circuit-switched networks?

If all circuits are busy, a new call cannot be placed.

Which statement describes a network that supports QoS?

The network provides predictable levels of service to different types of traffic.

What are two functions of intermediary devices on a network? (Choose two.)

They direct data along alternate pathways when there is a link failure. & They filter the flow of data, based on security settings.

Which two statements about the relationship between LANs and WANs are true? (Choose two.)

WANs connect LANs at slower speed bandwidth than LANs connect their internal end devices. & WANs are typically operated through multiple ISPs, but LANs are typically operated by single organizations or individuals.

Match the form of network communication with its description. (Not all options are used.)

an audio-based medium that allows people to deliver their recordings to a wide audience = podcast interactive websites where people create and share user-generated content with friends and family = social media web pages that groups of people can edit and view together = wiki real-time communication between two or more people = instant messaging

An employee at a branch office is creating a quote for a customer. In order to do this, the employee needs to access confidential pricing information from internal servers at the Head Office. What type of network would the employee access?

an intranet Intranet is a term used to refer to a private connection of LANs and WANs that belongs to an organization. An intranet is designed to be accessible only by the organization's members, employees, or others with authorization.

Which three network tools provide the minimum required security protection for home users? (Choose three.)

antivirus software & antispyware software & a firewall

Which term describes the state of a network when the demand on the network resources exceeds the available capacity?

congestion When the demand on the network resources exceeds the available capacity, the network becomes congested. A converged network is designed to deliver multiple communication types, such as data, video and voice services, using the same network infrastructure.

A company is contemplating whether to use a client/server or a peer-to-peer network. What are three characteristics of a peer-to-peer network? (Choose three.)

easy to create & lacks centralized administration & less cost to implement Because network devices and dedicated servers are not required, peer-to-peer networks are easy to create, less complex, and have lower costs. Peer-to-peer networks also have no centralized administration. They are less secure, not scalable, and those devices acting as both client and server may perform slower.

Requiring strong, complex passwords is a practice that supports which network security goal?

ensuring data confidentiality

What type of network traffic requires QoS?

video conferencing