NETWORK +

Which MAC address begins a frame? A. Receiving system B. Sending system C. Network D. Router

A The frame begins with the MAC address of the receiving NIC, followed by the MAC address of the sending NIC, followed in turn by the data and CRC.

What Windows utility do you use to find the MAC address for a system? A. IPCONFIG B. IPCFG C. PING D. MAC

A. All versions of Windows use IPCONFIG/ALL from the command line to determine the MAC address.

Which of the following is a duplex fiber-optic connection? A. LC B. RJ-45 C. ST D. SC

A. Of the options given, only the LC connector is designed for duplex fiber-optic.

Which of the following is an example of a MAC address? A. 0—255 B. 00-50-56-A3-04-0C C. SBY3M7 D. 192.168.4.13

B. A MAC address is a 48-bit value, and no two NICs ever share the same MAC address—ever. 00-50-56-A3-04-0C is a MAC address. Answer D (192.168.4.13) is an IP address.

What is the most common category of UTP used in new cabling installations? A. CAT 5 B. CAT 5e C. CAT 6 D. CAT 6a

B. CAT 5e is the most common cabling category used today, though CAT 6 is gaining in popularity

Which of the following topologies requires termination? A. Star B. Bus C. Mesh D. Ring

B. In a bus topology, all computers connect to the network via a main line. The cable must be terminated at both ends to prevent signal reflection.

Which of the following is a type of coaxial cable? A. RJ-45 B. RG-59 C. BNC D. Barrel

B. RG-59 is a type of coaxial cable.

What uniquely identifies every NIC? A. IP address B. Media access control address C. ISO number D. Packet ID number

B. The unique identifier on a network interface card is called the media access control (MAC) address.

A frame ends with a special bit called the cyclic redundancy check (CRC). What does the CRC do? A. Cycles data across the network B. Verifies that the MAC addresses are correct C. Verifies that the data arrived correctly D. Verifies that the IP address is correct

C The data is followed by a special bit of checking information called the cyclic redundancy check, which the receiving NIC uses to verify that the data arrived correctly.

Where does a hub send data? A. Only to the receiving system B. Only to the sending system C. To all the systems connected to the hub D. Only to the server

C. Data comes into a hub through one wire, and is then sent out through all the other wires. A hub sends data to all the systems connected to it.

A NIC sends data in discrete chunks called _______________. A. Segments B. Sections C. Frames D. Layers

C. Data is sent in discrete chunks called frames. Networks use frames to keep any one NIC from hogging the wire

Of the topologies listed, which one is the most fault tolerant? A. Point-to-point B. Bus C. Star D. Ring

C. Of the choices listed, only star topology has any fault tolerance.

A MAC address is known as a(n) __________ address. A. IP B. Logical C. Physical D. OEM

C. The MAC address is a physical address

Which layer of the OSI seven-layer model keeps track of a system's connections to send the right response to the right computer? A. Application layer B. Presentation layer C. Session layer D. Transport layer

C. The Session layer keeps track of a system's connections, to ensure that it sends the right response to the right computer

Which network topology connects nodes with a central ring of cable? A. Star B. Bus C. Ring D. Mesh

C. The aptly named ring topology connects nodes with a central ring of cable

Star-bus is an example of a _______________ topology. A. Transitional B. System C. Hybrid D. Rampant

C. Token Ring networks use a star physical topology and a ring signal topology.

What term is used to describe the interconnectivity of network components? A. Segmentation B. Map C. Topology D. Protocol

C. Topology is the term used to describe the interconnectivity of network components.

Coaxial cables all have a(n) _______________ rating. A. Resistance B. Watt C. Speed D. Ohm

D. All coaxial cables have an Ohm rating. RG-59 and RG-6 both are rated at 75 Ohms

Which network topology is most likely seen only in wireless networks? A. Star B. Bus C. Ring D. Mesh

D. Mesh is, for the most part, unique to wireless networks.

Which layer of the OSI seven-layer model controls the assembly and disassembly of data? A. Application layer B. Presentation layer C. Session layer D. Transport layer

D. The Transport layer controls the assembly and disassembly of data.