Modules 4 - 7: Ethernet Concepts Exam
What makes fiber preferable to copper cabling for interconnecting buildings? (Choose three.)
greater distances per cable run limited susceptibility to EMI/RFI greater bandwidth potential
What is one advantage of using the cut-through switching method instead of the store-and-forward switching method?
has a lower latency appropriate for high-performance computing applications
Which three basic parts are common to all frame types supported by the data link layer? (Choose three.)
header data trailer
What does the term "attenuation" mean in data communication?
loss of signal strength as distance increases
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
With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs?
the magnetic field around the adjacent pairs of wire
What is the purpose of the FCS field in a frame?
to determine if errors occurred in the transmission and reception
What are two actions performed by a Cisco switch? (Choose two.)
using the source MAC addresses of frames to build and maintain a MAC address table utilizing the MAC address table to forward frames via the destination MAC address
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
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
What is contained in an Ethernet header and trailer?
source MAC address destination MAC address error-checking information
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 OSI physical layer term describes the physical medium which uses electrical pulses?
copper cable
Which two devices commonly affect wireless networks? (Choose two.)
cordless phones microwaves
Which switching method has the lowest level of latency?
fast-forward
Which is a multicast MAC address?
01-00-5E-00-00-03
Which two functions are performed at the LLC sublayer of the OSI data link layer? (Choose two.)
Adds Layer 2 control information to network protocol data. Enables IPv4 and IPv6 to utilize the same network interface and media.
Which statement is true about the CSMA/CD access method that is used in Ethernet?
All network devices must listen before transmitting.
Which statement describes an extended star topology?
End devices connect to a central intermediate device, which in turn connects to other central intermediate devices.
What is the auto-MDIX feature?
It enables a device to automatically configure an interface to use a straight-through or a crossover cable.
What are two characteristics of fiber-optic cable? (Choose two.)
It is not affected by EMI or RFI. It is more expensive than UTP cabling is.
Which two statements describe the services provided by the data link layer? (Choose two.)
It manages the access of frames to the network media. It packages various Layer 3 PDUs into a frame format that is compatible with the network interface
What is a characteristic of the LLC sublayer?
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.
Which two statements describe features or functions of the logical link control sublayer in Ethernet standards? (Choose two.)
Logical link control is implemented in software. The data link layer uses LLC to communicate with the upper layers of the protocol suite.
1 - rollover, 2 - straight-through, 3 - crossover
Refer to the exhibit. The PC is connected to the console port of the switch. All the other connections are made through FastEthernet links. Which types of UTP cables can be used to connect the devices?
00-60-2F-3A-07-CC
Refer to the exhibit. What is the destination MAC address of the Ethernet frame as it leaves the web server if the final destination is PC1?
The untwisted length of each wire is too long.
Refer to the exhibit. What is wrong with the displayed termination?
fiber
Refer to the graphic. What type of cabling is shown?
What action will occur if a host receives a frame with a destination MAC address of FF:FF:FF:FF:FF:FF?
The host will process the frame.
Which statement describes a characteristic of the frame header fields of the data link layer?
They vary depending on protocols.
What type of communication rule would best describe CSMA/CD?
access method
