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NJR 9 study guide
isqa 380
| Question | Answer | |||
|---|---|---|---|---|
| A local area network (LAN) is a computer network whose span is relatively small – perhaps confined to abusiness office, one or two departments, a modest building, a small campus, or a home. | T | F | ||
| MAC addresses sometimes are called burned-in addresses (BIAs) because they are stored in read-only memory(ROM) on the NIC. | T | F | ||
| Layer 1 deals with transmitting and receiving bit streams via electricity or light, and physical specifications for device connection. Layer 2 involves frame assembly and disassembly, frame synchronization, point-to-point flow and error control, physical | T | F | ||
| Dedicated-server LANs often are called client/server LANs, because the stations (clients) request and receive services from the servers. | T | F | ||
| The MAC scheme uses flat addresses. Although flat addresses uniquely identify individual machines, they do not have any information as to where the machines are or, for that matter, any relation to each other. | T | F | ||
| Ethernet was not the first commercially successful LAN–that honor goes to ARCnet, released in 1977–but it has grown to become by far the most widely installed LAN. | T | F | ||
| Technically, the medium for wireless is air or space; the signals travel through air and space analogously to electrical signals traveling through a wire or light signals traveling through a fiber-optic cable. In practice, though, the medium is referre | T | F | ||
| The network operating system (NOS) mediates between the stations of the LAN, the LAN resources, and the processes being run, much the way a computer operating system (OS) mediates between the computer's resources and the software being run. | T | F | ||
| Two basic LAN classifications are dedicated-server (also called server-centric) and peer-to-peer. In the latter, each station is an equal (peer) of any other station. | T | F | ||
| Except for the network operating system (discussed later in this section), almost all of the LAN protocols are embedded in hardware and firmware on a network interface card (NIC), which has ports to accommodate connectors for the medium being used, and wh | T | F | ||
| Computers function as user stations and as LAN servers. Server computers differ from those used as stations by being faster and configured with much more memory and disk space. The number and types of servers employed depend on the usage demands of the LA | T | F | ||
| In most cases, LAN links and WAN links are privately owned. | F | T | ||
| In the OSI model architecture, layer 3 (data link) is subdivided into a lower sub-layer, Medium Access Control, and an upper sub-layer, Logical Link Control (LLC). | F | T | ||
| LAN hardware and software are the concern of the two highest layers of the Open Systems Interconnection(OSI) and TCP/IP model architectures. | F | T | ||
| LANs run namely on varieties of coaxial and twisted pair cables, fiber-optic cables, and wireless. | T | F | ||
| The most common configuration of token ring is | a physical star | a mesh | a logical star | a physical bus |
| A network interface card | plugs into the system board. | does not have ports to accommodate connectors for the medium being used. | does not have to be installed in every node of a LAN | may not take the form of a PC card. |
| Network-attached storage | is based on servers dedicated solely to file sharing. | provides all the other services typical of LAN file servers. | is a stand-alone storage device | can have disk capacity added to a server-based LAN without shutting it down. |
| The most commonly used method for creating protocol-based VLANs is | called frame tagging. | to decide by a frame-by-frame basis | by using a LAN emulator | function in LANE mode. |
| The goal of segmentation is | to reduce overall congestion by grouping stations together according to traffic patterns. | to create grouped collision domains. | group stations without a common data source. | to increase traffic within each segment. |
| LAN hardware and software are the concern of | layer 1 and layer 2. | layer 3 and layer 4 | layer 3 | |
| The collision window | is also referred to as slot time. | is the same as p-persistence. | is the same as the non-persistent strategy. | is sometimes called the interframe gap (IFG). |
| The NOS | incorporates the protocols needed to operate the LANs. | does not manage file security. | does not channel incoming actions to the local OS. | does not control operations of servers. |
| MAC addresses are | flat. | geographically based. | software based. | hierarchical. |
| Switches for attribute-based VLANs are configured | by creating list mappings. | A) by defining frame characteristics. | by the network administrator. | by defining frame protocol. |
| Propagation speed | determines how long it takes for the bits to travel the length of the bus. | is not affected by attenuation. | determines how long it takes for a station to transmit a complete frame. | determines the frame size. |
| A more efficient way to to interconnect LANs is pg 206 | through a backbone. | through a gateway. | through a bridge. | through a router. |
| In a dedicated server LAN | at least one server must be a file server. | stations can take on server duties. | a printer server is required. | a server can function as a station. |
| An example of a traffic monitor is | a bridge. | a hub. | a switch. | a gateway. |
| A storage area network pg 198 | is a high speed specialized local network that connects a variety of storage devices. | provides all the other services typical of LAN file servers. | can be located anywhere on the LAN. | is utilized with servers dedicated solely to file sharing. |
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