Test your basic knowledge |

CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
A. DNS b. SMTP c. POP
255.255.255.0
A. application b. presentation c. session d. transmision e. network f. data link g. physical

2. 3 terms that define the forms of help available within the Cisco IOS
MAC
A. hot keys b. context-sensitive c. command syntax check
Network portion
A. minimizing of collisions b. division into broadcast domains

3. After an ethernet collision - which device has priority to transmit data?
80 (HTTP)
Rollover cable
A. it has centralized administration b. security is easier to enforce
Any device whose backoff timer expires first.

4. What is a characteristic of a logical point-to-point topology?
A default gateway (router).
The MAC protocol can be very simple.
Create signals that represent the bits in each frame for the media.
A. Cat5 UTP b. Cat6 UTP

5. 3 primary functions of the data link layer encapsulation
Rollover cable
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
It uses lasers as the light source.
A. addressing b. error detection c. frame delimiting

6. What 2 type of cables would most commonly be used for new runs?
255.255.255.0
A physical topology.
A. Cat5 UTP b. Cat6 UTP
Host A

7. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Router
Network Layer Packet
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
MAC

8. During a TCP session - if packets arrive out of order - what will happen?
A. flow control b. session establishment c. numbering and sequencing
A. next-hop b. metric/interface c. destination network address
The packets will be delivered and reassembled at destination.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

9. What do end devices do?
Originate data flow.
A. physical layer b. DLL layer
Physical
A. not affected by EMI of RFI b. most expensive type of LAN cabling

10. What command can be used to determine if the router has experienced any input or output errors?
IP Protocol
The MAC protocol can be very simple.
Show Interfaces
A. DB 60 b. Winchester 15-pin c. smart serial

11. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
Minimal delays in data delivery.
Create signals that represent the bits in each frame for the media.
A. ethernet utilizes CSMA/CD b. defined as placement of data frames on the media c. DLL protocols define the rules for access to different media

12. Why is flow control used for TCP data transfer?
No collisions will occur on this link.
255.255.255.0
To prevent the receiver from being overwhelmed by incoming data.
A. next-hop b. metric/interface c. destination network address

13. What is the proper order of the OSI Layers?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. decentralized resources b. resource sharing w/o a dedicated server
Is used by the server to resolve names.
0 to 1023

14. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Supports error detection.
A. the device will still operate at the same Layer 2 address (the address it had before) b. Layer 3 address must me reassigned for it to communicate w/ the network
Switch
32 bits

15. What is a default gateway address?

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16. 3 functions of the upper data link sublayer in the OSI model
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
MAC
Rollover cable
A. minimizing of collisions b. division into broadcast domains

17. What is a drawback of the CSMA/CD access method?
Time-to-live (TTL)
Collisions can decrease network performance.
Originate data flow.
A. Cat5 UTP b. Cat6 UTP

18. In business LANs - which connector is used w/ twisted-pair networking cable?
It provides for the exchange of data over a common local media.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Identify the device that allows local network computers to communicate w/ devices in other networks.
RJ-45

19. What does the IEEE 802.2 standard represent in Ethernet technologies?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. larger address space b. data types and classes of service c. authentication and encryption
Logical Link Control sublayer
As the commands are entered.

20. 3 measures of data transfer
It does not support encryption.
A. goodput b. throughput c. bandwidth
It has expanded adressing capabilities.
Show Interfaces

21. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Physical
A random delay helps prevent the stations from experiencing another collision during transmission.
A. next-hop b. metric/interface c. destination network address
A. Cat5 UTP b. Cat6 UTP

22. What are 2 features of User Diagram Protocol (UDP)?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Binary ANDing
Originate data flow.
A. low overhead b. connectionless

23. What are key considering factors when grouping hosts into common networks?
It provides interface between applications on either end of the network.
A. MTA b. SMTP
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. purpose b. geographic location c. ownership

24. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Next-Hop Address
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. enable mode b. priviledge executive mode
A. non-deterministic b. less overhead c. collisions exist

25. How does the application layer on a server process multiple client requests for services?
It uses support from the lower layers to distinguish between connections to the service.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. security is difficult to enforce b. if one of the computers is responding to file sharing requests - that computer is functioning as a server
A. DB 60 b. Winchester 15-pin c. smart serial

26. What type of routing uses information that is manually entered into the routing table?
Network Layer
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Static
A. enable mode b. priviledge executive mode

27. What is the purpose of a default gateway?
Fiber
Identify the device that allows local network computers to communicate w/ devices in other networks.
TCP initializes the sequence numbers for the sessions.
It uses lasers as the light source.

28. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
172.16.192.160
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Window Size

29. 3 statements of media acess control
A. copper UTP b. optical fiber
A. ethernet utilizes CSMA/CD b. defined as placement of data frames on the media c. DLL protocols define the rules for access to different media
A. DNS b. SMTP c. POP
RJ-45

30. What is a benefit of a WAN?
Rollover cable
A. private addresses are blocked from public internet by routers b. the ip address 127.0.0.1 is the loopback - directs traffic to itself
TCP initializes the sequence numbers for the sessions.
Host mobility

31. What are 3 properties of contention-based media access for a shared media?
DNS
A. router b. firewall
Network address
A. non-deterministic b. less overhead c. collisions exist

32. What correctly describes a MAC address?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. addressing b. error detection c. frame delimiting
A. netstat -r b. route PRINT
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

33. Network Protocols
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A default gateway (router).
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

34. What kind of problems are caused by excessive broadcast traffic on network segments?
Console
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
To prevent the receiver from being overwhelmed by incoming data.
It uses lasers as the light source.

35. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Switch
Fiber
Source and Destination IP address
When connecting a host to a switch.

36. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
Hosts return to listen-before-transmit mode.
172.16.192.160
Source and Destination IP address
Network portion

37. 2 characteristics of peer-2-peer
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. decentralized resources b. resource sharing w/o a dedicated server
A. Physical b. Data Link
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

38. What are the advantages of using a client-server model?
A. it has centralized administration b. security is easier to enforce
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Flash
Network portion

39. What are 2 protocols for transfering web resources?
A. show startup-config b. show running-config
The physical address is added.
A. HTTP b. HTTPS
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

40. 3 properties of peer-2-peer applications
Application Layer
A. acts as both client and server w/ same communication b. hybrid mode includes a centralized directory of files c. can be used in client-server networks
A. HTTP b. HTTPS
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

41. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. addressing b. error detection c. frame delimiting
Ctrl + Shift + 6
0 to 1023
A physical topology.

42. Which layer supplies services and allows user interface?
A. security is difficult to enforce b. if one of the computers is responding to file sharing requests - that computer is functioning as a server
Network Access
Application Layer
Rollover cable

43. What can you identify when you examine the Network Layer header?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
The destination host address.
When connecting a host to a switch.
Show Interfaces

44. Which device is used to create or divide broadcast domains?
A. hot keys b. context-sensitive c. command syntax check
Router
Logical Link Control sublayer
A. physical layer b. DLL layer

45. What layer encapsulates segments into packets?
A. if destination network is directly connected - router forwards packet to destination host b. if no route exists for the destination and the default route is present - packet if fowarded to the next-hop c. if the originating host has a default gate
A. Physical b. Data Link
Network Layer
A physical topology.

46. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
A. DNS b. SMTP c. POP
SMB
A. acts as both client and server w/ same communication b. hybrid mode includes a centralized directory of files c. can be used in client-server networks
A. physical layer b. DLL layer

47. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
They must wait until the first hosts finish transfering the media.
A. DNS b. SMTP c. POP
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

48. What information is added during encapsulation at OSI Layer 3?
TCP initializes the sequence numbers for the sessions.
Time-to-live (TTL)
Source and Destination IP address
It reduces unnecessary broadcasts.

49. When destination network is not in the routing table - What are 2 actions the router might take?
Host A
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A random delay helps prevent the stations from experiencing another collision during transmission.
A. not affected by EMI of RFI b. most expensive type of LAN cabling

50. What is the role of the OSI Application Layer?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Host mobility
It does not support encryption.
It provides interface between applications on either end of the network.