What Is The Media Access Method Used By Ethernet

Question: an ethernet frame is composed of two parts: the header and data portion... True or false?

Answer: FALSE

Question: what is the most common topology and technology combination in use today?

Answer: switched / Ethernet

Question: What are some characteristics of fiber-optic cabling?

Answer: Lower bandwidth capability, Used in large internetworks to connect switches and routers, Can be used in electrically noisy environments,Carries data over longer distances than UTP does

Question: What are some characteristics of a logical ring topology?

Answer: -One technology uses a MAU-It is used by FDDI-Some technologies use a token

Question: 802.11g can transmit at _____ Mbps.

Answer: 54

Question: Which of the following is a field of the most common Ethernet frame type?

Answer: 1.FCS2.Destination MAC Address3.Data

Question: which technology is likely to be implemented as a point-to-point physical topology?

Answer: Wireless Bridge

Question: Which of the following is true of a MAC address?

Answer: A destination address of 12 hexadecimal Fs is a broadcast

Question: In a large network, in which several switches need to be connected together, usually one device is placed at the center, forming a(n) ____________ star.

Answer: extended

Question: The physical star topology uses a _____ to interconnect computers in a LAN.

Answer: Central device

Question: A network's logical topology often depends on the central device's electronics... True or false?

Answer: TRUE

Question: Which media access method is used by FDDI?

Answer: Token passing

Question: CSMA/CD is the media access method used by Ethernet (802.3) and Wi-Fi (802.11) networks.

Answer: False - CSMA/CD is only used in half-duplex mode(802.3z, an, ae - are full-duplex only) Wi-Fi uses CSMA/CA

Question: When using UTP cabling, what is the maximum cable length that can be used from the NIC to a hub or switch?• 100 meters• 10 meters• 1000 meters• 10 feet• 100 feet

Answer: • 100 meters

Question: Which of the following is a characteristic of a switched logical topology? (Choose all that apply.)• It is the most secure logical topology• Creates dynamic connections• Uses a physical star topology• Sometimes called a shared-media topology• Uses a physical bus topology

Answer: • Creates dynamic connections• Uses a physical star topology

Question: Which of the following is NOT an advantage of a physical star?• Centralized monitoring and management of traffic• Use of faster technologies• Easier network upgrades• None of these choices• Provides redundancy and fault tolerance

Answer: • Provides redundancy and fault tolerance

Question: Which of the following is true about the token ring technology? (Choose all that apply.)• It uses a physical ring topology.• Less expensive than CSMA/CD networks.• All computers have equal access to the media.• It uses RTS/CTS signaling before transmission can occur.• Only the computer with the token can transmit data.

Answer: • All computers have equal access to the media.• Only the computer with the token can transmit data.

Question: What is the main advantage of a point-to-point topology?• all information is encrypted• a reliable and fast backbone• relatively inexpensive• provides redundancy and fault tolerance• data travels on a dedicated link

Answer: • data travels on a dedicated link

Question: An Ethernet frame is composed of two parts: the header and data portion.

Answer: False - a frame header, data (frame payload), frame trailer

Question: Which of the following is true about infrastructure mode in wireless networks? (Choose all that apply.)• Uses a central device• Resembles a physical bus and logical ring• Most like a logical bus and physical star• Less secure than ad hoc mode• Best used for temporary networks

Answer: • Uses a central device• Most like a logical bus and physical star(logical bus because all nodes hear all nodes in most cases)All other points describe ad hoc mode

Question: What type of logical topology does a Wireless LAN use?

Answer: logical bus

Question: What is 2 advantages of a start topology

Answer: Allows faster technologies than a bus doesCentralized monitoring of network traffic

Question: Which of the following is true of IEEE 802.3an?

Answer: Operates only in full-duplex mode

Question: What is the name of the most widely used physical topology in networks today?

Answer: Extended Star

Question: Which access method uses a "listen before sending" strategy?

Answer: CSMA/CD

Question: 802.11a operates at __Ghz

Answer: 54

Question: Which of the following is not a component of an Ethernet frame?-Type-None-Destination MAC address-Source MAC address-FCS

Answer: None

Question: A physical star topology has a single point of failure that may cause the entire network to go down.. true or false

Answer: TRUE

Question: Network _________ is the method a network interface uses to access the medium and send data frames and the structure of these frames

Answer: technology

Question: A network's logical topology takes into account the way that the computers are cabled together and whether they have a central connecting device or not... true or false

Answer: FALSE

Question: the four most common physical topologies are bus, star, ring, and mesh

Answer: FALSE

Question: ________ is the arrangement of network cabling between devices?

Answer: physical topology

Question: How many channels may be used in North America by Wi-Fi networks operating at the 2.4 GHz frequency range?

Answer: 11

Question: What are 2 features of 802.11n?

Answer: -Offers speeds up to 600 Mbps-Operates at the 2.4 GHz and the 5.0 GHz frequencies

Question: Which best describes a typical wireless LAN

Answer: Logical bus topology

Question: A switch can operate in full-duplex mode, sending and receiving data at the same time, which may result in collisions... true or false

Answer: FALSE

Question: what is the wireless device used to link buildings without cable?

Answer: bridge

Question: When a wireless computer uses a peer-to-peer connection to directly connect to another wireless computer, it is operating in what mode?

Answer: ad hoc

Question: What are 2 characteristics of unshielded twisted-pair cabling?

Answer: -Has a distance limitation of 100 meters -Susceptible to electrical interference

Question: How many links would you need in a full mesh configuration if you had 4 nodes?

Answer: 6

Question: What are two advantages of a star topology?

Answer: -Allows faster technologies than a bus does-Centralized monitoring of network traffic

Question: What are 3 characteristics of a logical ring topology?

Answer: -It's used by FDDI-Some technologies use a token-One technology uses a MAU

Question: What are 2 properties of Ethernet?

Answer: -Scalable-Best effort delievery system

Question: What is the media access method used by Ethernet?

Answer: CSMA/CD

Question: When a wireless computer connects with an AP before it connects with other devices, it is operating in ____________ mode.

Answer: infrastructure

Question: When a Wi-FI signal passes through a solid object, it is said to attenuate(weaken). This type of signal interference is classifies as ___.

Answer: absorption

Question: The arrangement of cabling and how the cables connect one device to another in a network is considered the network's logical topology, ad the path data travels between computers on a network is considered the network's physical topology... true or false

Answer: FALSE

Question: What is the name of the media access method used by Ethernet?

Answer: CSMA/CD

Question: What are 2 facts about full-duplex Ethernet?

Answer: It's possible only with switchesCollision detection is turned off