Networking exam 2
What does the Power Line Communication (PLC) standard specify?
A standard that uses high frequencies to send data along power lines.
Frame Relay, ATM, MPLS, ISDN, and VoIP are all examples of WAN technologies. True
True
The purpose of a repeater is to
analog hardware device used to extend a LAN. The repeater amplifies and sends all incoming signals to the other side
Packet switching is typically associated with telephone technology.
false
Twisted pair Ethernet uses RJ45 connectors which are interchangeable with the jacks used to connect telephones.
False
The fundamental paradigm used to achieve simultaneous transmission of packets across a network is known as queue and process.
False
Point-to-point refers to a communication mechanism that connects exactly two communicating entities.
true
How large is the maximum Ethernet frame, including the CRC?
1518 bytes
The IEEE 802.15 standard applies to wireless _______ communication.
802.11
How is the type field in the Ethernet header used?
802.3 standard interprets the original type field as a packet length and adds an extra 8 byte header that contains the packet type the extra header is known as a logical link control / sub-network attachment point or SNAP
What is Synchronous Optical Network (SONET)?
A standard designed to carry digital voice and now a standard for digital circuits used throughout the Internet.
Local area networks spans a major city or metropolitan.
False
Which type of routing protocol requires the packet switches to send messages periodically across the network carrying the status of a link between the two packet switches?
Link State Routing
Local Area Network (LAN) technologies were invented after the invention of Wide Area Network (WAN) technologies.
True
Packet Switching forms the basis of the internet
True
The goal of a wide area network is to allow as many computers as possible to send packets simultaneously.
True
The purpose of ___________ is for communication over a short distance between a small peripheral device such as a headset or mouse and a system such as a cell phone or a computer.
bluetooth
A mechanism used to connect two LAN segments and forward frames from one segment to another is called a
bridge
Local Area Networks (LANs) are classified according to their topology. What is the logical topology of the third generation (twisted pair) Ethernet?
bus
Local Area Networks (LANs) are classified according to their topology. What is the physical topology of the original Thicknet version of Ethernet?
bus
A form of packet routing that sends a complete list of destinations and the current cost of reaching each is called
distance vector routing
Second generation of Ethernet wiring used a thinner, coaxial cable that was more flexible than Thicknet and it used an Attachment Unit Interface (AUI) to interconnect computers.
false
The expense of packet switching technologies depend on the distances they span.
false
Spread spectrum can be used to achieve one of the following two goals:
increase overall performance make transmission more immune to noise
is used for line-of-sigh communication between a small device, often a hand-held controller, and a nearby system such as a compute or entertainment center
infrared
The purpose of a Distributed Spanning Tree (DST) is to
prevent a cycle from causing an endless loop, bridges implement an algorithm that computes a DST
Circuit Switching provides
the illusion of an isolated physical path between a sender and a receiver Circuit switching provides the illusion of an isolated physical path between a pair of communicating entities.
A Network Interface Card (NIC) is independent from the rest of the computer and a user can choose to replace the NIC without making other changes.
true
A layer 2 switch is an electronic device that resembles a hub but simulates a bridged network that has only one computer per LAN segment.
true
A maximum length specification of the local area network is a fundamental part of LAN technology because hardware is engineered to emit a fixed amount of energy.
true
Circuit switching refers to a communications mechanism that establishes a path between sender and receiver with guaranteed isolation from paths used by other pairs of senders and receivers.
true
The original version of Ethernet wiring was informally called thick wire Ethernet or Thicknet because the communication medium consisted of heavy coaxial cable.
true
for a WAN to operate correctly, each switch must have a forwarding table, and must forward packets. Furthermore, values in the forwarding table must guarantee
universal communication optimal routes
In a packet-switched network each frame corresponds to a packet. Match the term with its definition. marks the beginning of a frame contains information used to process the frame contains the message being sent marks the end of a frame
SOH header payload EOT
Which of the following is not true concerning the individual Media Access Control address assigned to each piece of Internet interface hardware?
assigned by the IEE
ISM is an acronym for
industrial science medical
A packet switch does not need to keep complete information about thow to reach all possible computers; it only needs to know which outgoing link to use to reach a given switch.
true