networking

what are two characteristics of fiber optic cable

not affected by EMI or RFI and more expensive then UTP cabling

with the use of unshielded twisted pair copper wire in a network what causes crosstalk within the cable pairs

magnetic field around the adjacent pairs of wire

what is the primary role of the physical layer in transmitting data on the network

create signals that represent the bits in each frame on to the media

which two devices commonly affect wireless networks

microwaves and cordless phones

what two factors could interfere with the communication carried over UTP cables

crosstalk and electromagnetic interference

what occurs at the data link layer for a PC connected to an ethernet network during the encapsulation process

physical address is added

which two statements describe the services provided by the data link layer

it manages the access of frames to the network media and packages various layer 3 PDUs into a frame format that is compatible

which two fields or features does ethernet examine to determine if a received frame is passed to the data link layer or discarded by the NIC

Auto-MDIX and Frame check sequence

what is the function of the CRC value that is found in the FCS field of a frame

to verify the integrity of the recevied frame

what are three ways that media access control is used in networking

ethernet utilized CSMA/CD, media access control provides placement of data frames onto the media , and data link layer protocols define the rules for access to different media

what is contained in the trailer of a data link frame

error detection

which statement is true about the CSMA/CD access method that is used in ethernet

all network devices must listen before transmitting

which media communication type does not require media arbitration in the data link layer

full duplex

a network team is comparing physical WAN topologies for connecting remote sites to a headquarters building. which topology provides high availability and connects some but not all remote sites

partial mesh

which switching method uses CRC value in a frame

store and forward

which switching method has the lowest level of latency

fast forward

what are two examples of the cut-through switching method

fast forward switching and fragment free

a layer 2 switch is used to switch incoming frames from a 1000BASE-T port to a port connected to a 100Base-T network. which method of memory buffering would work best for this task

shared memory buffering

which is a multicast MAC address

01-00-5E-00-00-03

what is the auto-MDIX feature

enables a device to automatically configure an interface to use a straight-through or a crossover cable

when the store and forward method of switching is in use what part of the ethernet frame is used to perform an error check

CRC in the trailer

what is the purpose of the FCS field in a frame

to determine if errors occurred in the transmission and reception

which advantage does the store and forward switching method have compared with the cut-through switching method

frame error checking

which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame

store and forward switching

what is the auto-MDIX feature on a switch

the automatic configuration of an interface for a straight through or a crossover ethernet cable connection

refer to the exhibit

rollover, straight-through, crossover

what does the term attenuation mean in data communtion

loss of signal strength as distance increases

what makes fiber preferable to copper cabling for interconnecting

greater bandwidth, longer distance , limited susceptibility to EMI/RFI

what OSI physical layer term describes the measure of usable data transferred over a given period of time

goodput

which two functions are performed at the MAC sublayer of the OSI data link layer

controls the NIC responsible for sending and receiving data on the physical medium and enables ipv4 and ipv6 utilize the same network interface and media

what action will occur if a switch receives a frame with destination MAC address FF:FF:FF:FF:FF:FF

the switch forwards it out all ports except the ingress port