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. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
255.255.255.224
A. minimizing of collisions b. division into broadcast domains
They must wait until the first hosts finish transfering the media.

2. When do changes take effect in a Cisco router?
Binary ANDing
Network address
The packets will be delivered and reassembled at destination.
As the commands are entered.

3. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
Fiber
Host A
The packets will be delivered and reassembled at destination.

4. After an ethernet collision - which device has priority to transmit data?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Any device whose backoff timer expires first.
Network
Source and Destination IP address

5. What are key considering factors when grouping hosts into common networks?
Network Media Control
Router
A. purpose b. geographic location c. ownership
2046

6. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. flow control b. session establishment c. numbering and sequencing
255.255.255.0

7. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. physical layer b. DLL layer
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

8. During encapsulation - what happens in the Data Link Layer?
A. performance degradation b. security issues c. host identification
Transport
The physical address is added.
Is a layer of specific encapsulation.

9. What is the role of MTA in handling email?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Flash
Source Port
A. router b. firewall

10. What is a characteristic of a single-mode fiber-optic cable?
Network Access
It uses lasers as the light source.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Time-to-live (TTL)

11. What networking devices are recommended to be assigned static IP addresses?
Window Size
255.255.255.224
Transport
A. servers b. routers c. network printers

12. Where is the IOS file stored at?
Flash
Host A
Network Layer Packet
A backbone cable.

13. What layer encapsulates segments into packets?
UDP
Network Layer
A. it has centralized administration b. security is easier to enforce
A. purpose b. geographic location c. ownership

14. 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. the router will discard the packet b. the router will send a time exceeded message to the source host
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
IP Protocol

15. What is a protocol that provides connectionless network layer services?
IP Protocol
Wireless
Application Layer
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

16. What is the function of the DLL?
A. router b. firewall
255.255.255.0
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
It provides for the exchange of data over a common local media.

17. What makes fiber preferable to copper for interconnecting buildings?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. next-hop b. metric/interface c. destination network address
A. application b. services
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

18. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. show startup-config b. show running-config
Network portion

19. During a TCP session - if packets arrive out of order - what will happen?
A. perform degradation b. security issues c. host identification
Router(config)# hostname Costas
The packets will be delivered and reassembled at destination.
It reduces unnecessary broadcasts.

20. If you have a PC - 3 routers and a Laptop... How many unique CRC calculation will take place as traffic routes from the PC to the Laptop?
Console
8
FTP
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

21. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Destination Network Address
A. media sharing b. logical topology
The destination host address.

22. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Network Layer
Window Size
UDP
Collisions can decrease network performance.

23. What is PDU?
A. servers b. routers c. network printers
A. show startup-config b. show running-config
Is a layer of specific encapsulation.
It uses lasers as the light source.

24. 3 statements about routes and their use
Network address
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
Destination Network Address
A. physical layer b. DLL layer

25. When is a straight-through cable used in a network?
IP is not properly installed
When connecting a host to a switch.
Router(config)# interface FastEthernet 0/1
Supports error detection.

26. What device can check for faults - integrity and performance of media?
OTDR
Host mobility
Destination Network Address
It reduces unnecessary broadcasts.

27. Default Gateway is incorrect on the host - What is the impact on the communications?
They must wait until the first hosts finish transfering the media.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Network address
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

28. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
A. DNS b. SMTP c. POP
No collisions will occur on this link.
A. addressing b. error detection c. frame delimiting

29. When a network service fails - which port is most often used to access a router for management purposes?
Identify processes or services that are communicating with end devices.
Console
Network address
OTDR

30. Statements that describe LAN
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. servers b. routers c. network printers
Next-Hop Address
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

31. What is the purpose of a default gateway?
It has expanded adressing capabilities.
Identify the device that allows local network computers to communicate w/ devices in other networks.
To enable a receiving host to forward the data to the appropriate application.
SMB

32. How many bits make up an IPv4 address?
Console interface
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Network Media Control
32 bits

33. statements of IP adressing
Is used by the server to resolve names.
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
It uses support from the lower layers to distinguish between connections to the service.
Console interface

34. What kind of problems are caused by excessive broadcast traffic on network segments?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. Physical b. Data Link
A. performance degradation b. security issues c. host identification
They must wait until the first hosts finish transfering the media.

35. What does the IEEE 802.2 standard represent in Ethernet technologies?
Hub
A. decentralized resources b. resource sharing w/o a dedicated server
Rollover cable
Logical Link Control sublayer

36. 3 facts about the network portion of an IPv4 address
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
It does not support encryption.
Twisting of the cables
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

37. What is a default gateway address?

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38. What are 2 common characteristics associated w/ dynamic routing protocols?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A backbone cable.

39. What info is found in the TCP and UDP header info?
A. they initiate data exchanges b. they may upload data to servers
Host A
Source and Destination Ports
A physical topology.

40. 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?
OTDR
172.16.192.160
Network portion
A. physical layer b. DLL layer

41. In a connectionless system - What is correct?
Hosts return to listen-before-transmit mode.
Destination is not contacted before a packet is sent.
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

42. What is the purpose of the preamble in an ethernet frame?
A. netstat -r b. route PRINT
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
0 to 1023
To facilitate the entry and exit of data on media.

43. Which layer supplies services and allows user interface?
Application Layer
SMB
It provides for the exchange of data over a common local media.
Console

44. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
Console
A. purpose b. geographic location c. ownership
Is a layer of specific encapsulation.
80 (HTTP)

45. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
As the commands are entered.
2046
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Physical

46. What can be a problem that is reduced by adding end-to-end addressing?
The physical address is added.
Flash
Static
It reduces unnecessary broadcasts.

47. What determines the method of media access control?
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
A. application b. services
Identify processes or services that are communicating with end devices.
A. media sharing b. logical topology

48. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A. next-hop b. metric/interface c. destination network address
Time-to-live (TTL)
A. minimizing of collisions b. division into broadcast domains
Router(config)# interface FastEthernet 0/1

49. 3 functions of the upper data link sublayer in the OSI model
Time-to-live (TTL)
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
255.255.255.0
It provides for the exchange of data over a common local media.

50. What is the proper order of the OSI Layers?
Router
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
2046