6.1.7 Practice Questions

Which of the following is the best definition for a LAN?

A LAN is a network in a small geographic area, like in an office. A WAN is a network whose computers and servers are geographically far apart, but still connected. A PAN (personal area network) is the interconnection of components, such as laptops, mobile devices, printers, mice, keyboards, and other Bluetooth equipped devices, using some form of wireless technology within a personal range (typically 10 meters or less). A VPN is the extension of a private network over a shared or public network, such as the internet.

Match the network types on the left with the descriptions on the right. Each network type may be used once, more than once, or not at all.

A network in a small geographic area that typically uses wires to connect systems together.- LAN A small network used for connecting devices, such as a notebook computer, a wireless headset, a wireless printer, and a smartphone.- PAN A group of networks that are geographically isolated, but are connected to form a large internetwork.- WAN Similar to a standard LAN, but uses radio signals instead of wires to connect systems together.- WLAN A network that covers an area as small as a few city blocks to as large as an entire city.- MAN A set of subnets connected to each other, typically by wires, using at least one router.- LAN The following network types are defined by the geographical area they cover: Personal Area Network (PAN): a very small network used for communication between personal devices. For example, a PAN may include a notebook computer, a wireless headset, a wireless printer, and a smartphone. A PAN's range is limited to only a few feet. Local Area Network (LAN): a network in a small geographic area, like an office. A LAN typically uses wires to connect systems together. For example, a LAN is usually a set of subnets connected to each other using routers to connect the subnets. Wireless Local Area Network (WLAN): a network that covers an area that is roughly the same size as a standard LAN. However, it uses radio signals instead of wires to connect systems together. Metropolitan Area Network (MAN): a network that covers an area as small as a few city blocks to as large as an entire metropolitan city. MANs are typically owned and managed by a city as a public utility. Wide Area Network (WAN): a group of LANs that are geographically isolated, but are connected to form a large internetwork.

You have implemented an ad hoc wireless network that doesn't employ a wireless access point. Every wireless network card can communicate directly with any other wireless network card on the network. What type of physical network topology has been implemented in this type of network?

Mesh This type of network uses a physical mesh topology. There's no central connecting point. Any host can communicate directly with any other host on the network. A mesh network, such as this one, is usually impractical on a wired network. Each host would have to have a separate dedicated network interface and cable for each host on the network. However, a mesh topology can be implemented with relative ease on a wireless network due to the lack of wires.

You have been asked to implement a network infrastructure that will accommodate failed connections. Which of the following network topologies provides redundancy for a failed link?

Mesh In a mesh topology, each network device is interconnected with all other network nodes. This creates multiple data paths. And in the event of a failed link, the data has an alternate route to arrive at its destination. The star topology connects network devices to the network with a single patch cable, and the failure of a patch cable will make the connected device unavailable. The bus topology has a single point of failure. If there is a break in the network media, the network will be unavailable. A single break in a physical ring topology will disable the network.

You have a network that uses a logical bus topology. How do messages travel through the network?

Messages are broadcast to all devices connected to the network.

You have a network that uses a logical ring topology. How do messages travel through the network?

Messages travel from one device to the next until they reach the destination device.

Which of the following terms refers to a network resource sharing model that uses access control lists saved on each computer?

Peer to Peer Access to shared resources are controlled separately on each computer in the peer-to-peer model (a Windows peer-to-peer network is called a workgroup). For example, each computer in a peer-to-peer network maintains its own set of user accounts. An intranet is a private network that uses internet technologies. Services on an intranet are only available to hosts that are connected to the private network. An extranet is a private network that uses internet technologies, but its resources are made available to external (but trusted) users. The client/server model places shared resources on a server. Resources are accessed by clients.

A group of workers in an office space communicate with each other on their smartphones and tablet devices through an ad hoc network linked using Bluetooth technology protocols. Which of the following network types is in use?

Personal Area Network (PAN) A piconet is an ad hoc network that connects personal devices and runs over Bluetooth technology. A piconet is an example of a PAN. A WAN covers a large geographical area and is made up of many smaller networks. A LAN covers a small local area and is used to connect workstations, printers, and other devices. A MAN covers a large campus or city and is smaller than a WAN.

Which of the following topologies connects each network device to a central hub?

Star

What device is used to create a physical star topology?

Switch A physical star topology uses a switch or a hub. Routers are used to connect multiple subnets together. A repeater regenerates a network signal so that it can be transmitted for longer distances.