Chapter 2

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

A) logical

When a host on network A sends a message to a host on network B, which address does the router look at? A) logical B) physical C) port D) none of the above

C) Added

As the data packet moves from the upper to the lower layers, headers are _______. A) Rearranged B) Removed C) Added D) Modified

D) none of the above

12. The Internetworking Protocol (IP) is a ________ protocol. A) connection-oriented B) reliable C) both a and b D) none of the above

B) WAN

A ______ is a data communication system spanning states, countries, or the whole world. A) MAN B) WAN C) LAN D) none of the above

C) point-to-point

A _______ connection provides a dedicated link between two devices. A) primary B) multipoint C) point-to-point D) secondary

A) LAN

A _______ is a data communication system within a building, plant, or campus, or between nearby buildings. A) LAN B) MAN C) WAN D) none of the above

A) protocol

A ________ is a set of rules that governs data communication. A) protocol B) forum C) standard D) none of the above

A) 16

A port address in TCP/IP is ______ bits long. A) 16 B) 32 C) 48 D) none of the above

B) simplex

A television broadcast is an example of _______ transmission. A) half-duplex B) simplex C) full-duplex D) automatic

A) Security

An unauthorized user is a network _______ issue. A) Security B) Reliability C) Performance D) All the above

A) simplex

Communication between a computer and a keyboard involves ______________ transmission. A) simplex B) half-duplex C) full-duplex D) automatic

D) all of the above

Data flow between two devices can occur in a _______ way. A) simplex B) half-duplex C) full-duplex D) all of the above

D) all of the above

Devices may be arranged in a _____ topology. A) mesh B) ring C) bus D) all of the above

B) 6-byte

Ethernet uses a ______ physical address that is imprinted on the network interface card (NIC). A) 32-bit B) 6-byte C) 64-bit D) none of the above

C) Reliability

Frequency of failure and network recovery time after a failure are measures of the _______of a network. A) Performance B) Security C) Reliability D) Feasibility

B) presentation

In the OSI model, encryption and decryption are functions of the ________ layer. A) application B) presentation C) session D) transport

D) a and b

ICMPv6 includes _______. A) IGMP B) ARP C) RARP D) a and b

A) 128

IPv6 has _______ -bit addresses. A) 128 B) 32 C) 64 D) variable

C) full-duplex

In _______ transmission, the channel capacity is shared by both communicating devices at all times. A) simplex B) half-duplex C) full-duplex D) half-simplex

B) point-to-point

In a ______ connection, two and only two devices are connected by a dedicated link. A) multipoint B) point-to-point C) (a) and (b) D) none of the above

A) multipoint

In a _______ connection, more than two devices can share a single link. A) multipoint B) point-to-point C) primary D) secondary

B) multipoint

In a ________ connection, three or more devices share a link. A) point-to-point B) multipoint C) (a) and (b) D) none of the above

A) removed

In the OSI model, as a data packet moves from the lower to the upper layers, headers are _______. A) removed B) added C) rearranged D) modified

A) process-to-process message delivery

In the OSI model, what is the main function of the transport layer? A) process-to-process message delivery B) node-to-node delivery C) synchronization D) updating and maintenance of routing tables

A) session

In the OSI model, when data is transmitted from device A to device B, the header from A's layer 5 is read by B's _______ layer. A) session B) physical C) transport D) presentation

D) IMPs

In the original ARPANET, _______ were directly connected together. A) routers B) host computers C) networks D) IMPs

C) Network

Layer 2 lies between the physical layer and the _______ layer. A) Data link B) Transport C) Network D) None of the above

D) Application

Mail services are available to network users through the _______ layer. A) Transport B) Physical C) Data link D) Application

D) OSI

The _______ model shows how the network functions of a computer ought to be organized. A) ANSI B) CCITT C) ISO D) OSI

C) bits

The physical layer is concerned with the movement of _______ over the physical medium. A) dialogs B) protocols C) bits D) programs

A) five-layer; before

TCP/IP is a ______ hierarchical protocol suite developed ____ the OSI model. A) five-layer; before B) six-layer; before C) seven-layer; before D) five-layer; after

C) Five

The Internet model consists of _______ layers. A) Eight B) Seven C) Five D) Three

B) seven

The OSI model consists of _______ layers. A) eight B) seven C) five D) three

B) transport

The _______ layer links the network support layers and the user support layers. A) session B) transport C) data link D) network

D) application

The TCP/IP _______ layer is equivalent to the combined session, presentation, and application layers of the OSI model. A) data link B) network C) physical D) application

A) IP

The ____ address uniquely defines a host on the Internet. A) IP B) port C) specific D) physical

B) ISO

The ____ created a model called the Open Systems Interconnection, which allows diverse systems to communicate. A) IEEE B) ISO C) OSI D) none of the above

B) network

The ______ layer adds a header to the packet coming from the upper layer that includes the logical addresses of the sender and receiver. A) data link B) network C) physical D) none of the above

A) session

The ______ layer establishes, maintains, and synchronizes the interactions between communicating devices. A) session B) physical C) transport D) network

B) data link

The ______ layer is responsible for moving frames from one hop (node) to the next. A) transport B) data link C) physical D) none of the above

A) network

The ______ layer is responsible for the source-to-destination delivery of a packet across multiple network links. A) network B) physical C) data link D) transport

C) Medium

The _______ is the physical path over which a message travels. A) Protocol B) Signal C) Medium D) All the above

A) Physical

The _______ layer changes bits into electromagnetic signals. A) Physical B) Transport C) Data link D) None of the above

D) physical

The _______ layer coordinates the functions required to transmit a bit stream over a physical medium. A) data link B) transport C) network D) physical

B) presentation

The _______ layer ensures interoperability between communicating devices through transformation of data into a mutually agreed upon format. A) network B) presentation C) transport D) data link

B) data link

The _______ layer is responsible for delivering data units from one station to the next without errors. A) physical B) data link C) transport D) network

C) Physical

The _______ layer is the layer closest to the transmission medium. A) Network B) Transport C) Physical D) Data link

B) Transport

The _______ layer lies between the network layer and the application layer. A) Data link B) Transport C) Physical D) None of the above

D) physical

The ________ address, also known as the link address, is the address of a node as defined by its LAN or WAN. A) IP B) port C) specific D) physical

C) physical

The ________ address, also known as the link address, is the address of a node as defined by its LAN or WAN. A) logical B) port C) physical D) none of the above

A) transport

The ________ layer is responsible for the process-to-process delivery of the entire message. A) transport B) physical C) network D) data link

A) application

The _________ layer enables the users to access the network. A) application B) physical C) data link D) transport

C) Message

The information to be communicated in a data communications system is the _______. A) Medium B) Protocol C) Message D) Transmission

A) network

The physical, data link, and network layers are the ______ support layers. A) network B) user C) both (a) and (b) D) neither (a) nor (b)

A) Transport

The process-to-process delivery of the entire message is the responsibility of the _______ layer. A) Transport B) Application C) Physical D) Network

A) user

The session, presentation, and application layers are the ____ support layers. A) user B) network C) both (a) and (b) D) neither (a) nor (b)

B) OSI

The seven-layer _____ model provides guidelines for the development of universally compatible networking protocols. A) ISO B) OSI C) IEEE D) none of the above

B) port

The_____ address identifies a process on a host. A) specific B) port C) IP D) physical

A) transport

The_________ layer is responsible for the delivery of a message from one process to another. A) transport B) network C) physical D) none of the above

D) all of the above

There are ______________ Internet service providers. A) regional B) local C) national and international D) all of the above

C) ARPANET

This was the first network. A) CSNET B) NSFNET C) ARPANET D) ANSNET

B) port

To deliver a message to the correct application program running on a host, the _______ address must be consulted. A) physical B) port C) IP D) none of the above

A) Transport

When data are transmitted from device A to device B, the header from A's layer 4 is read by B's _______ layer. A) Transport B) Application C) Physical D) None of the above

D) EIA

Which agency developed standards for physical connection interfaces and electronic signaling specifications? A) ISO B) ITU-T C) ANSI D) EIA

D) All the above

Which of the following is an application layer service? A) File transfer and access B) Mail service C) Remote log-in D) All the above

A) FCC

Which organization has authority over interstate and international commerce in the communications field? A) FCC B) IEEE C) ITU-T D) ISOC

C) Star

Which topology requires a central controller or hub? A) Mesh B) Bus C) Star D) Ring

A) Bus

Which topology requires a multipoint connection? A) Bus B) Star C) Mesh D) Ring

B) Standards were needed to allow any two systems to communicate

Why was the OSI model developed? A) The rate of data transfer was increasing exponentially B) Standards were needed to allow any two systems to communicate C) Manufacturers disliked the TCP/IP protocol suite. D) None of the above

A) Topology

______ refers to the physical or logical arrangement of a network. A) Topology B) Mode of operation C) Data flow D) None of the above

C) Forums

_______ are special-interest groups that quickly test, evaluate, and standardize new technologies. A) Standards organizations B) Regulatory agencies C) Forums D) All of the above

C) UDP

_______ is a process-to-process protocol that adds only port addresses, checksum error control, and length information to the data from the upper layer. A) IP B) TCP C) UDP D) none of the above

C) TCP/IP

_______ is the protocol suite for the current Internet. A) UNIX B) NCP C) TCP/IP D) ACM

B) Syntax

_______ refers to the structure or format of the data, meaning the order in which they are presented. A) Semantics B) Syntax C) Timing D) All of the above

B) Timing

_______ refers to two characteristics: when data should be sent and how fast it can be sent. A) Semantics B) Timing C) Syntax D) none of the above

B) Semantics

________ defines how a particular pattern to be interpreted, and what action is to be taken based on that interpretation. A) Syntax B) Semantics C) Timing D) None of the above

B) An internet

________ is a collection of many separate networks. A) A WAN B) An internet C) A LAN D) None of the above

C) RFC

________ is an idea or concept that is a precursor to an Internet standard. A) RCF B) ID C) RFC D) none of the above

B) TCP

__________ provides full transport layer services to applications. A) UDP B) TCP C) ARP D) none of the above


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