Test Out Networking Overview, Hardware, Media, Ethernet and Addressing. 6.1-6.5

Which of the following is a valid MAC address? Answer = C0-34-FF-15-01-8E

A MAC or hardware address is a unique identifier hard coded on every network adapter card. A valid MAC address has a total of 12 hexadecimal numbers. Numbers from 0 to 9 and A to F. Values may range from 00 to FF.

You want to implement a fault tolerant topology as you interconnect routers on your wide area network. Which of the following would meet your needs?

Answer: A mesh topology has multiple connections at each node, increasing connectivity fault tolerance. None of the other topologies have native fault tolerance built in.

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

Answer: In a logical ring topology, messages travel to each device in turn. If the message is not intended for that device, the message is forwarded to the next device on the network.

Which of the following topologies connects each device to a neighboring device? A. Ring B. Tree C. Star D. Bus

Answer: In ring topologies, each device is connected to a neighboring device, until a ring is formed.

Which of the following topologies connects each network device to a central hub? A. Bus B. Ring C. Mesh D. Star

Answer: Star topologies connect each device on the network to a central hub.

Which of the following topologies connects all devices to a trunk cable? A. Ring B. Ad-hoc C. Bus D. Star

Answer: The bus topology connects all devices to a trunk cable.

Which of the following is a rating of the amount of data that can be sent over a network in a period of time? A. Jitter B. Bandwidth C. Latency D. Broadband

Answer: The network bandwidth is a rating of how much data can be sent over a network. Broadband is a signaling scheme that divides a single network media into multiple transmission channels. Latency measures the delay between transmission and reception of network data.

What device is used to create a physical star topology? A. Repeater B. Bridge C. Router D. Switch

Answer: 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.

Which of the following is a wired networking method most commonly used today by desktop PCs and other network devices to connect to a local area network? A. Token Ring B. Blue Tooth C. ArcNet D. Ethernet E. 802.11n

Answer: Ethernet is a wired, local area network (LAN) standard. Most laptops and desktop computers have built-in Ethernet network ports.

In which of the following topologies does each device on the network act as a repeater, sending the signal to the next device? A. Tree B. Ring C. Star D. Bus

Answer: In ring topologies does each device on the network act as a repeater, sending the signal to the next device?

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

Answer: A LAN is a network in a small geographic area, like in an office.

Which of the following hardware devices regenerates a signal out all connected ports without examining the frame or packet contents?

Answer: A hub and a repeater send received signals out all other ports. These devices do not examine the frame or the packet contents. A switch or a bridge use the MAC address in a frame for forwarding decisions.

Which of the following LAN devices receives a signal on one port, and forwards that signal only to the port where the destination device is connected? A. Hub B. Router C. Switch D. Network adapter

Answer: A switch offers guaranteed bandwidth to each port; unlike a hub which shares bandwidth among all the network ports.

A host wants to send a message to another host with the IP address 115.99.80.157. IP does not know the hardware address of the destination device. Which protocol can be used to discover the MAC address?

Answer: ARP Hosts use the Address Resolution Protocol or ARP to discover the hardware address of a host.

An 8- port switch receives a frame on port number 1. The frame is addressed to an unknown device. What will the switch do? A. Send the frame out the destination port. B. Drop the frame C. Send the frame out ports 2-8 D. Send the frame out all 8 ports

Answer: Because the switch does not know the port that is used to reach the destination device, it will send the frame out all ports except for the port on which the frame was received. After the switch learns the port that is used to reach the destination device, it will send the frame out only that port.

How do switches and bridges learn where devices are located on a network?

Answer: Bridges and switches learn addresses by copying the MAC address of the source device and placing it into the MAC address table. The port number which the frame entered is also recorded in the table and associated with the source MAC address.

Which of the following are advantages of using a domain to manage a network?

Answer: Centralized admin and Scalability A domain is an example of client/server networking where shared resources reside on special computers called servers. Other computers, called clients, connect to the server to access resources.

Which of the following terms describes a group of computers and users that utilize centralized resources, administration, and security settings?

Answer: Domain and Directory A domain and a directory both identify a group of computers that utilize centralized resources, administration, and security settings.

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?

Answer: Mesh In a mesh topology, each network device is interconnected to 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.

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

Answer: Messages are broadcast to all devices connected to the network. Messages sent using a physical bus topology are broadcast to all devices in the network. The device in the middle of the star, receives the message and forwards it on to all other devices.

Which of the following statements accurately describes how a modem works?

Answer: Modem is shorthand for modulator/ demodulator. Its job is to convert digital data from a PC into analog telephone signals and transmits them through a telephone network. It also receives analog data from the telephone network and converts it into digital PC data.

What type of network describes a workgroup? A. Server-based network B. Ad-hoc network C. Client-based network D. Peer-to-peer network

Answer: Peer-to-peer A workgroup is a type of peer-to-peer network. Network resources are distributed among all the hosts in the network. Any given host can both provide and consume network services at the same time.

You have a small network that uses a hub to connect multiple devices. What physical topology is used? A. Ring B. Mesh C. Bus D. Star

Answer: Star A hub creates a network with a physical star topology. A physical star topology that employs a hub for a central connecting point uses a logical bus topology, where messages are sent to all devices connected to the hub.

Which of the following best describes how a switch functions?

Answer: Switches have multiple segments or devices. The switch forwards frames to the appropriate port. They function similarly to a hub, except instead of sending packets to all ports, switches send packets only to the destination computer's port.

Which network component connects a device to the transmission media and allows it to send and receive messages?

Answer: The network interface card, or NIC, allows a device to send and receive messages over the transmission media.

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?

Answer: 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 is usually impractical on a wired network.

Which of the following terms refers to a network resource sharing model that uses access control lists saved on each computer? A. Workgroup B. Directory C. Client/server D. Peer-to-peer E. Domain

Answer: Workgroup and Peer-to-peer. Access to shared resources are controlled separately on each computer in the workgroup or peer-to-peer models. For example, each computer in a peer-to-peer network maintains its own set of user accounts.