CCNA Questions and Answers


Which of the following are data link layer encapsulation details? (Choose two.) 
 
*Packets are put into frames. 
Data is packaged into a packet. 
Data is segmented into segments. 
Data is converted for Internet travel. 
*An address is added to identify the directly connected device. 
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Which device is used to connect LANs that are geographically separated? 
 
hub 
bridge 
*router 
repeater 
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Which of the following is the Layer 4 PDU? 
 
bit 
frame 
packet 
*segment 
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What is important to remember about the data link layer of the OSI model when considering Peer to Peer communication? (Choose three.) 
 
It links data to the transport layer. 
It encapsulates frames into packets. 
*It provides a service to the network layer. 
*It encapsulates the network layer information into a frame. 
*Its header contains a physical address which is required to complete the data link functions. 
It encodes the data link frame into a pattern of 1s and 0s (bits) for transmission on the medium. 
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Which of the following is true regarding network bandwidth? 
 
Bandwidth is free. 
*Bandwidth has capacity limits. 
Bandwidth never increases. 
Bandwidth is not a key factor in analyzing network performance. 
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Which of the following is the official name for the address assigned to each network interface card (NIC) by its manufacturer? 
 
NIC address 
*MAC address 
IP address 
Source Address 
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Which physical network topology uses a single backbone cable and connects all hosts directly to this cable? 
 
ring 
star 
*bus 
mesh 
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Which OSI and TCP/IP layer appears in both models yet has different functions in each? 
 
transport 
session 
*application 
Internet 
physical 
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Which of the following topologies are considered logical topologies? (Choose two.) 
 
bus 
*token-passing 
star 
mesh 
*broadcast 
hierarchical 
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During the data encapsulation process, how is the data broken down by the transport layer? 
 
packets 
*segments 
data bits 
frames 
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Which of the following describe a LAN? (Choose two.) 
 
*operates within a limited geographical area 
provides dial-up connectivity 
uses serial interfaces to allow operation at lower speeds 
*connects physically adjacent devices 
ensures single access to specialty hosts 
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Which of the following are considered valid types of VPNs? (Choose three.) 
 
internal 
* intranet 
external 
*extranet 
local 
*access 
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Which of the following physical topologies connects all cables to a central point of concentration? 
 
ring 
*star 
mesh 
bus 
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Refer to the figure. What is the maximum possible throughput obtained end to end on this network when the user on Lab A communicates with the user on LAB D? 
 
The maximum possible throughput is based on the largest connection, the T3. 
*The maximum possible throughput is based on the smallest connection, the T1. 
There is not enough data to determine the maximum possible throughput. 
The maximum possible throughput is the T1 plus T3 speed divided by 2. 
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What is the name of the Layer 1 PDU? 
 
segment 
packet 
frame 
*bit 
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Which layer of the TCP/IP model encapsulates TCP segments into packets? 
 
application 
transport 
*internet 
network 
physical 
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Which layer of the TCP/IP model deals with quality-of-service issues such as reliability, flow control, and acknowledgement? 
 
application 
internet 
* transport 
network 
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From the following list, choose the data packaging type that is created at the data link layer during the data encapsulation process. 
 
packets 
segments 
data bits 
* frames 

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