Final Exam Hard Questions
What are three characteristics of multicast transmission? (Choose three.)
ς� The source address of a multicast transmission is in the range of 224.0.0.0 to 224.0.0.255.
ς� A single packet can be sent to a group of hosts.
ς� Multicast transmission can be used by routers to exchange routing information.
ς� Routers will not forward multicast addresses in the range of 224.0.0.0 to 224.0.0.255.
ς� Computers use multicast transmission to request IPv4 addresses.
ς� Multicast messages map lower layer addresses to upper layer addresses.
What are two benefits of using a layered network model? (Choose two.)
It assists in protocol design.
ς� It speeds up packet delivery.
ς� It prevents designers from creating their own model.
ς� It prevents technology in one layer from affecting other layers.
ς� It ensures a device at one layer can function at the next higher layer.
Which two OSI model layers have the same functionality as two layers of the TCP/IP model? (Choose two.)
ς� data link
ς� network
ς� physical
ς� session
ς� transport
What are two characteristics of fiber-optic cable? (Choose two.)
ς� It is not affected by EMI or RFI.
ς� Each pair of cables is wrapped in metallic foil.
ς� It combines the technique of cancellation, shielding, and twisting to protect data.
ς� It typically contains 4 pairs of fiber-optic wires.
ς� It is more expensive than UTP cabling is.
What are the three primary functions provided by Layer 2 data encapsulation? (Choose three.)
ς� error correction through a collision detection method
ς� session control using port numbers
ς� data link layer addressing
ς� placement and removal of frames from the media
ς� detection of errors through CRC calculations
ς� delimiting groups of bits into frames
ς� conversion of bits into data signals
What are two services provided by the OSI network layer? (Choose two.)
ς� performing error detection
ς� routing packets toward the destination
ς� encapsulating PDUs from the transport layer
ς� placement of frames on the media
ς� collision detection
What are two functions of NVRAM? (Choose two.)
ς� to store the routing table
ς� to retain contents when power is removed
ς� to store the startup configuration file
ς� to contain the running configuration file
ς� to store the ARP table
What are three characteristics of multicast transmission? (Choose three.)
ς� The source address of a multicast transmission is in the range of 224.0.0.0 to 224.0.0.255.
ς� A single packet can be sent to a group of hosts.
ς� Multicast transmission can be used by routers to exchange routing information.
ς� Routers will not forward multicast addresses in the range of 224.0.0.0 to 224.0.0.255.
ς� Computers use multicast transmission to request IPv4 addresses.
A user opens three browsers on the same PC to access www.cisco.com to search for certification course information. The Cisco web server sends a datagram as a reply to the request from one of the web browsers. Which information is used by the TCP/IP protocol stack in the PC to identify which of the three web browsers should receive the reply?
ς� the destination IP address
ς� the destination port number
ς� the source IP address
ς� the source port number
What are two ways that TCP uses the sequence numbers in a segment? (Choose two.)
ς� to identify missing segments at the destination
ς� to reassemble the segments at the remote location
ς� to specify the order in which the segments travel from source to destination
ς� to limit the number of segments that can be sent out of an interface at one time
ς� to determine if the packet changed during transit
Which two tasks are functions of the presentation layer? (Choose two.)
ς� compression
ς� addressing
ς� encryption
ς� session control
ς� authentication
Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the network?
ς� Data is sent from the internet layer to the network access layer.
ς� Packets are sent from the network access layer to the transport layer.
ς� Segments are sent from the transport layer to the internet layer.
ς� Frames are sent from the network access layer to the internet layer.
During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?
ς� An IP address is added.
ς� The logical address is added.
ς� The physical address is added.
ς� The process port number is added.
Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on? (Choose two.)
ς� The frame has the broadcast address as the destination address.
ς� The destination address is unknown to the switch.
ς� The source address in the frame header is the broadcast address.
ς� The source address in the frame is a multicast address.
How many usable IP addresses are available on the 192.168.1.0/27 network?
ς� 256
ς� 254
ς� 62
ς� 30
32
Why are port numbers included in the TCP header of a segment?
ς� to indicate the correct router interface that should be used to forward a segment
ς� to identify which switch ports should receive or forward the segment
ς� to determine which Layer 3 protocol should be used to encapsulate the data
ς� to enable a receiving host to forward the data to the appropriate application
ς� to allow the receiving host to assemble the packet in the proper order
What are two examples of the cut-through switching method? (Choose two.)
ς� store-and-forward switching
ς� fast-forward switching
ς� CRC switching
ς� fragment-free switching
ς� QOS switching
What information is added during encapsulation at OSI Layer 3?
ς� source and destination MAC
ς� source and destination application protocol
ς� source and destination port number
ς� source and destination IP address
Why does a Layer 3 device perform the ANDing process on a destination IP address and subnet mask?
ς� to identify the broadcast address of the destination network
ς� to identify the host address of the destination host
ς� to identify faulty frames
ς� to identify the network address of the destination network
Refer to the exhibit. On the basis of the output, which two statements about network connectivity are correct? (Choose two.)
ς� There is connectivity between this device and the device at 192.168.100.1.
ς� The connectivity between these two hosts allows for videoconferencing calls.
ς� There are 4 hops between this device and the device at 192.168.100.1.
ς� The average transmission time between the two hosts is 2 milliseconds.
ς� This host does not have a default gateway configured.
Refer to the exhibit. Consider the IP address of 192.168.10.0/24 that has been assigned to a high school building. The largest network in this building has 100 devices. If 192.168.10.0 is the network number for the largest network, what would be the network number for the next largest network, which has 40 devices?
ς� 192.168.10.0
ς� 192.168.10.128
ς� 192.168.10.192
ς� 192.168.10.224
ς� 192.168.10.240
What important information is added to the TCP/IP transport layer header to ensure communication and connectivity with a remote network device?
ς� timing and synchronization
ς� destination and source port numbers
ς� destination and source physical addresses
ς� destination and source logical network addresses
Which three statements characterize UDP? (Choose three.)
ς� UDP provides basic connectionless transport layer functions.
ς� UDP provides connection-oriented, fast transport of data at Layer 3.
ς� UDP relies on application layer protocols for error detection.
ς� UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms.
ς� UDP relies on IP for error detection and recovery.
ς� UDP provides sophisticated flow control mechanisms.
Refer to the exhibit. An administrator is testing connectivity to a remote device with the IP address 10.1.1.1. What does the output of this command indicate?
ς� Connectivity to the remote device was successful.
ς� A router along the path did not have a route to the destination.
ς� A ping packet is being blocked by a security device along the path.
ς� The connection timed out while waiting for a reply from the remote device.
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