ITS-235 Quiz 9

b. presentation

In the OSI reference protocol model, Layer Six, the ____ layer, is responsible for functions common to many applications such as formatting and encryption. a. physical b. presentation c. network d. application

c. network

In the OSI reference protocol model, Layer Three, the ____ layer, provides services such as addressing and routing that move data to its destination. a. presentation b. physical c. network d. application

b. application

In the OSI transport protocol model, Layer Seven, the ____ layer, provides the interface to users and is responsible for formatting user data before passing it to lower layers for transmission to a remote host. a. physical b. application c. network d. presentation

b. bus

In the ____ topology, all sites are connected to a single communication line running the length of the network. a. gateway b. bus c. star d. ring

False (The entire table is updated and reissued every 30 seconds, whether or not changes have occurred; this increases internetwork traffic and negatively affects the delivery of messages.)

In the routing information protocol (RIP), the entire routing table is updated only when changes have occurred; this decreases internetwork traffic and positively affects the delivery of messages. True / False

False (Each packet is passed from node to node in one direction only, and the destination station copies the data into a local buffer.)

In a single loop ring topology network, each data packet is passed from node to node in both directions, and the destination station copies the data into a local buffer. True / False

a. PAN

A ____ includes information technology that operates within a radius of approximately 10 meters of an individual and is centered around that one person. a. PAN b. WAN c. LAN d. MAN

c. gateway

A ____ is a device and software used to connect two or more local area networks or systems that use different protocols; it translates one network's protocol into another, resolving hardware and software incompatibilities. a. tree b. bridge c. gateway d. router

True

A common goal of all networked systems is to provide a convenient way to share resources while controlling users' access to them. True / False

True

A local area network (LAN) is generally owned, used, and operated by a single organization and allows computers to communicate directly through a common communication line. True / False

protocol

A ring network can connect to other networks via a bridge or gateway depending on the ______________ used by each network.

protocol

A set of rules that control the flow of messages through a network best describes ______________.

wide area network (WAN)

A(n) ______________ defines a network configuration that interconnects communications facilities different parts of the world.

False (addressing protocols are closely related to the network topology and geographic location of each site.)

Addressing protocols are normally unrelated to the network topology and geographic location of each site. True / False

packet

As a connection model, _____________ switching does not require a dedicated connection where messages are individually routed between hosts with no previously established communication path.

True

Bridging between two homogeneous networks occurs at Layer 2 of the OSI transport protocol model, the data link layer. True / False

b. Physical

In the OSI reference protocol model, Layer One, the ____ layer, provides the mechanical, electrical, and functional specifications for connecting a device. a. Application b. Physical c. Presentation d. Network

True

Circuit switching is a communication model in which a dedicated communication path is established between two hosts. True / False

False (Devices are physically connected by means of cables that run between them, but the cables don't pass through a centralized controller mechanism.)

In a bus network topology, devices are physically connected by means of cables that run between them, and the cables pass through a centralized controller mechanism called the bus. True / False

gateway

In a network, a(n)______________ translates one network's protocol into another to resolve hardware and software incompatibilities.

star (or) hub (or) centralized

In a network, the______________ topology refers to a network in which multiple network nodes are connected through a single and central node.

True

Ethernet is the most widely known CSMA/CD protocol. True / False

d. a random period

If a collision occurs when using CSMA/CD, a jamming signal is sent immediately to both sending nodes, which then wait ____ before trying again. a. one millisecond b. one second c. one minute d. a random period

False (Round robin is an efficient technique when there are many nodes transmitting over long periods of time.)

Round robin access control is an inefficient technique when there are many nodes transmitting over long periods of time. True / False

True

Star topology permits easy routing because a central station knows the path to all other sites. True / False

True

The objective of a hybrid configuration is to select among the strong points of each topology and combine them to meet that system's communications requirements most effectively. True / False

True

The physical topology of a network may not reflect its logical topology. True / False

b. four

The TCP/IP reference model has ____ layers that roughly correlate to the OSI's seven layers. a. two b. four c. seven d. ten

True

The Transmission Control Protocol/Internet Protocol (TCP/IP) reference model is the basis for Internet communications and is the most widely used network layer protocol today. True / False

Open Systems Interconnection (OSI)

The ____________ model is a seven-layer conceptual structure describing computer network and the ways in which data passes through them.

c. 100 kilometers

The maximum circumference for a MAN is ____. a. 10 miles b. 50 kilometers c. 100 kilometers d. 200 miles

Circuit

_____________ switching establishes a dedicated communication path between two hosts.

False (These networks typically have either a bus or ring topology and are popular because access is fast and collisions are nonexistent.)

Token passing networks generally use either collision detection or collision avoidance techniques to deal with potential collisions. True / False

b. Name1

Under the Domain Name Service (DNS) protocol, in the address [email protected], the host name is ____. a. Someone b. Name1 c. Name2 d. Name3

d. host

Usually, the term "____" indicates a specific computer system whose services and resources can be used from remote locations. a. node b. site c. remote d. host

d. Bridge

When using a ring topology, a ____ can be used to connect to another network that uses the same protocol. a. Central controller b. Star c. Router d. Bridge

c. A telephone system

____ is an example of a circuit-switched network. a. The United States Postal Service b. The Internet c. A telephone system d. A local area network