TestOut Networking Pro ch 3 Exam Questions and Answers

TestOut Networking Pro ch 3 Exam Questions and Answers Network Adapter (also called a network interface card or NIC) -Answer-connects a host to the network medium. It is responsible for converting binary data into a format to be sent on the network medium Network adapter is responsible for -Answer-for converting binary data into a format to be sent on the network medium. Which are Transceiver and a modem Transceiver -Answer-is responsible for converting digital data into digital signals to be sent on the medium. The type of signal the transceiver sends depends on the type of network. A fiber optic NIC sends light signals, a wired NIC sends electronic signals on a wire, and a wireless NIC sends radio signals. To receive signals, the transceiver converts digital signals from the network to digital data for the PC. Modem -Answer-converts binary data to analog waves (modulation) on the sending end, and then converts the analog waves back to binary data (demodulation) on the receiving end. Network adapters are Layer 1 devices -Answer-because they send and receive signals on the network medium. They also Layer 2 devices because they must follow the rules for media access, and because they read the physical address in a frame Network adapters you choose -Answer-must match the network architecture you are connecting to Older network adapters -Answer-used an external transceiver to connect to the network media. However, all modern network adapters use a built-in transceiver. Transceiver Module -Answer-is used to change the media type of a port on a network device, such as a switch or a router. The following are the most common types of transceiver modules: • A GBIC (gigabit interface converter) is a larger-sized transceiver that fits in a port slot and is used for Gigabit media including copper and fiber optic. • An SFP (small form-factor pluggable) is similar to a GBIC but is a smaller size. An SFP is sometimes called a mini-GBIC. • An XFP transceiver is similar in size to an SFP but is used for 10 Gigabit networking. Media Converter -Answer-is used connect to network adapters that are using different media types. For example, a media converter could be used to connect a server with a fiber optic Ethernet NIC to a copper Ethernet cable. • Media converters work at the Physical layer (Layer 1). Media converters do not read or modify the MAC address in any way. • Media converters only convert from one media type to another within the same architecture (such as Ethernet). A media converter cannot translate between two different architectures. (This must be done using a bridge or a router. Converting from one architecture to another would require modifying the frame contents to modify the Data Link layer address.) MAC Address -Answer-is a unique identifier burned into the ROM of every Ethernet NIC. • The MAC address is a 12-digit (48-bit) hexadecimal number (each number ranges from 0-9 or A-F). • The address is often written as 00-B0-D0-06-BC-AC or 00B0.D006.BCAC (dashes, periods, and colons can be used to divide the MAC address parts). • The MAC address is globally unique by design. The first half (first 6 digits) of the MAC address is assigned to each manufacturer. The manufacturer determines the rest of the address, assigning a unique value that identifies the host address. A manufacturer that uses all the addresses in the original assignment can apply for a new MAC address assignment. • Devices use the MAC address to send frames to other devices on the same subnet. Some network cards allow you to change the MAC address through jumpers, switches, or software. However, there are few legitimate reasons for doing so. Address Resolution Protocol (ARP) -Answer-is used by hosts to discover the MAC address of a device from its IP address. Before two devices can communicate, they must know the MAC address of the receiving device. If the MAC a