Chapter 2
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