Network+ Chapter 4 Flashcards
________is a contention media-access method that allows all hosts on a network to share the same bandwidth of a link. Ch 4 -pg 90
Ethernet
True or False-Ethernet uses both Data Link and Physical layer specifications Ch 4 -pg 90
True
The term___________is an Ethernet term that refers to a particular network scenario wherein one device sends a packet out on a network segment and thereby forces every other device on that same physical network segment to pay attention to it. Ch 4 -pg 90
collision domain
a situation
where each device’s digital signals interfere with another on the wire—occurs and forces the
devices to retransmit later. Ch 4 -pg 90
collision event
A___________ refers to the set of all devices on a network segment that hear all the broadcasts sent on that segment. Ch 4 -pg 90
broadcast domain
What does the acronym CSMA/CD Stand for?
Ch 4 -pg 91
Carrier Sense Multiple Access with Collision Detection
CSMA/CD
Why was CSMA/CD created?
Ch 4 -pg 91
it was created to overcome the problem of those collisions that occur when packets are transmitted
simultaneously from different hosts.
What When a collision occurs on an Ethernet LAN, the following happens?
Ch 4 -pg 92
1) A jam signal informs all devices that a collision occurred.
2) The collision invokes a random backoff algorithm.
3) Each device on the Ethernet segment stops transmitting for a short time until the timers expire.
4) All hosts have equal priority to transmit after the timers have expired.
T or F You can run full duplex with just about any device except a hub? Ch 4 -pg 93
true
Ethernet at the Data Link layer is responsible for Ethernet addressing, commonly referred to as ? Ch 4 -pg 94
hardware addressing or MAC addressing
Ethernet MAC addresses are made up of________ addresses Ch 4 -pg 94
hexadecimal
is a computer-networking arrangement where two or more network interfaces on a host are combined for redundancy and/or increased throughput. ch 4 pg 101
Channel bonding (also known as Ethernet bonding)
is defined as the loss of signal strength as it travels the length of a cable and is measured in decibels (dB). ch 4 102
inherent attenuation
10Mbps baseband technology, using coax up to 185 meters in length also known as Thin net. ch 4 102
10Base2
10Mbps baseband technology, using coax up to 500 meters in length. Known as thicknet. Uses a physical and logical bus with AUI connectors. Up to 2,500 meters with
repeaters and 1,024 users for all segments.
10Base5
10Mbps using Category 3 UTP wiring. Unlike on 10Base2 and 10Base5 networks, each device must connect into a hub or switch, and you can have only one host per segment or wire. Uses an RJ-45 connector (8-pin modular connector) with a physical star topology
and a logical bus.
10BaseT
is a standard created by the IEEE 802.3 an committee to provide 10Gbps connections over conventional UTP cables (Category 5e, 6, or 7 cables).
10GBaseT
Whats the max transmission distance of 10Base5?
500 meters per segment
With 10baseT whats the Cable type,Max Speed, and transmission distance?
UTP, 10Mbps,100 Meters per segment
With 1000BaseT whats the Cable type,Max Speed, and transmission distance?
UTP ,1000Mbps, 100 meters
Ethernet was first implemented by a group called DIX. What are the 3 companies that make up DIX? ch 4 101
Digital, Intel, and Xerox
An alternating 1,0 pattern provides a 5MHz clock at the start of each packet, which allows the receiving devices to lock the incoming bit stream.
Preamble
Encapsulating a frame within a different type of frame is called? ch 4 99
tunneling
is responsible for combining bits into bytes and bytes into frames. Ch 4 pg 98
Data Link layer
is assigned by the Institute of Electrical and Electronics Engineers (IEEE) to an organization. It’s composed of 24 bits, or 3 bytes. ch 4 pg 98
organizationally unique identifier (OUI)
