Flashcards
Operating systems and networks - Set 1
Flashcards for quick repetition. Test your networks and operating systems knowledge.
Flashcards: 124
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A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?
presentation layer
network layer
data link layer
physical layer
Which type of UTP cable is used to connect a PC to a switch port?
straight-through
crossover
A network administrator is measuring the transfer of bits across the company backbone for a mission critical financial application. The administrator notices that the network throughput appears lower than the bandwidth expected. Which three factors could influence the differences in throughput? (Choose three.)
bylo
What is a characteristic of UTP cabling?
cladding
woven copper braid or metallic foil
immunity to electrical hazards
cancellation
What are two characteristics of fiber-optic cable? (Choose two.)
It is more expensive than UTP cabling is.
Each pair of cables is wrapped in metallic foil.
It is not affected by EMI or RFI.
It combines the technique of cancellation, shielding, and twisting to protect data.
It is more expensive than UTP cabling is.
It is not affected by EMI or RFI.
What is a characteristic of the LLC sublayer?
It provides delimitation of data according to the physical signaling requirements of the medium.
It provides the logical addressing required that identifies the device.
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.
It places information in the frame allowing multiple Layer 3 protocols to use the same network interface and media.
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
hub and spoke
mesh
point-to-point
What method is used to manage contention-based access on a wireless network?
CSMA/CD
priority ordering
CSMA/CA
What are the three primary functions provided by Layer 2 data encapsulation? (Choose three.)
placement and removal of frames from the media
data link layer addressing
delimiting groups of bits into frames
error correction through a collision detection method
detection of errors through CRC calculations
session control using port numbers
conversion of bits into data signals
data link layer addressing
delimiting groups of bits into frames
detection of errors through CRC calculations
What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?
It will strip off the data-link frame to check the destination IP address.
It will remove the frame from the media
It will forward the frame to the next host.
It will discard the frame
It will discard the frame
What are two examples of the cut-through switching method? (Choose two.)
QOS switching
store-and-forward switching
fragment-free switching
fast-forward switching
CRC switching
fragment-free switching
fast-forward switching
What are two actions performed by a Cisco switch? (Choose two.)
building a routing table that is based on the first IP address in the frame header
using the source MAC addresses of frames to build and maintain a MAC address table
examining the destination MAC address to add new entries to the MAC address table
forwarding frames with unknown destination IP addresses to the default gateway
utilizing the MAC address table to forward frames via the destination MAC address
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
Which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame?
fast-forward switching
cut-through switching
fragment-free switching
store-and-forward switching
store-and-forward switching
Refer to the exhibit. If host A sends an IP packet to host B, what will the destination address be in the frame when it leaves host A?
pytanie 29
What addresses are mapped by ARP?
destination MAC address to a destination IPv4 address
destination IPv4 address to the source MAC address
destination IPv4 address to the destination host name
destination MAC address to a destination IPv4 address
