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. What is the proper order of the OSI Layers?
Identify the device that allows local network computers to communicate w/ devices in other networks.
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
255.255.255.0
A. application b. presentation c. session d. transmision e. network f. data link g. physical

2. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. hot keys b. context-sensitive c. command syntax check
Hosts return to listen-before-transmit mode.
0 to 1023
A. the router will discard the packet b. the router will send a time exceeded message to the source host

3. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
RJ-45
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Is a layer of specific encapsulation.

4. Which combination of keys can be used to interrupt a ping or traceroute process?
Router(config)# hostname Costas
Is used by the server to resolve names.
Ctrl + Shift + 6
It uses support from the lower layers to distinguish between connections to the service.

5. What is a characteristic of a single-mode fiber-optic cable?
No collisions will occur on this link.
It uses lasers as the light source.
A. larger address space b. data types and classes of service c. authentication and encryption
Static

6. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
The physical address is added.
To prevent the receiver from being overwhelmed by incoming data.
A. they initiate data exchanges b. they may upload data to servers

7. What do you need to use for an initial configuration on a Cisco router?
A. HTTP b. HTTPS
Console interface
A. show startup-config b. show running-config
A. application b. services

8. What is a drawback of the CSMA/CD access method?
To enable a receiving host to forward the data to the appropriate application.
Collisions can decrease network performance.
8
Console interface

9. What is the role of MTA in handling email?
Ctrl + Shift + 6
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
When connecting a host to a switch.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

10. What is the primary reason for developing IPv6?
FTP
It has expanded adressing capabilities.
UDP
It provides for the exchange of data over a common local media.

11. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
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 default gateway (router).
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
Switch

12. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
Collisions can decrease network performance.
Flash
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

13. 3 terms that define the forms of help available within the Cisco IOS
A. hot keys b. context-sensitive c. command syntax check
Wireless
It provides interface between applications on either end of the network.
The physical address is added.

14. How does the application layer on a server process multiple client requests for services?
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
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
OTDR
It uses support from the lower layers to distinguish between connections to the service.

15. What is PDU?
Is a layer of specific encapsulation.
RJ-45
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. purpose b. geographic location c. ownership

16. If you have a full-duplex operational network - what can happen?
Network
No collisions will occur on this link.
Router(config)# hostname Costas
Router

17. Intermediary devices used to implement security between networks
80 (HTTP)
A. router b. firewall
A. netstat -r b. route PRINT
A. they initiate data exchanges b. they may upload data to servers

18. To make a console connection from a comp to a Cisco router - what cable should be used?
Rollover cable
A. Cat5 UTP b. Cat6 UTP
OTDR
Transport

19. 2 features that make switches preferable to hubs
Time-to-live (TTL)
A. minimizing of collisions b. division into broadcast domains
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
172.16.192.160

20. Which characteristics describe fiber optic cable?
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. not affected by EMI of RFI b. most expensive type of LAN cabling
Network Layer Packet
Flash

21. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
A backbone cable.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
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

22. If you have a small network w/ 3 computers...
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
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
To facilitate the entry and exit of data on media.
32 bits

23. What info is found in the TCP and UDP header info?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
SSH
Source and Destination Ports
SMB

24. What are 3 common problems w/ large networks?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. perform degradation b. security issues c. host identification
Application Layer
Hub

25. What is the primary purpose of Layer 4?
Is used by the server to resolve names.
Identify processes or services that are communicating with end devices.
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
Rollover cable

26. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Collisions can decrease network performance.
A. non-deterministic b. less overhead c. collisions exist

27. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
DNS
A. Physical b. Data Link
The magnetic field around the adjacent pairs of wire.
It reduces unnecessary broadcasts.

28. What is the purpose of resource records in DNS?
Is used by the server to resolve names.
Network Media Control
Source and Destination IP address
No collisions will occur on this link.

29. What method of signal transmission uses radio waves to carry signals?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Wireless
It provides for the exchange of data over a common local media.
No collisions will occur on this link.

30. If host A's DG is 10.0.0.1 and host B's DG is 10.0.0.2 - when the router's IP address is 10.0.0.1. Which one will go through?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Host A
Transport

31. What is an automated service that matches resource names w/ required IP addresses?
A. Cat5 UTP b. Cat6 UTP
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Minimal delays in data delivery.
DNS

32. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Network address
80 (HTTP)
Time-to-live (TTL)
Flash

33. What are the advantages of using a client-server model?
A. it has centralized administration b. security is easier to enforce
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
Transport
Router

34. What causes crosstalk within cable pairs when using UTP?
A. media sharing b. logical topology
Switch
A. minimizing of collisions b. division into broadcast domains
The magnetic field around the adjacent pairs of wire.

35. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. Cat5 UTP b. Cat6 UTP
FTP
Fiber

36. 3 statements of media acess control
A. identifies the communicating applications b. identifies multiple conversations between the hosts
It uses lasers as the light source.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
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

37. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
UTP
DNS
Time-to-live (TTL)
A. hot keys b. context-sensitive c. command syntax check

38. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
Ctrl + Shift + 6
A backbone cable.
Identify the device that allows local network computers to communicate w/ devices in other networks.

39. What can you identify when you examine the Network Layer header?
A. addressing b. error detection c. frame delimiting
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
Switch
The destination host address.

40. What are 2 protocols for transfering web resources?
It uses support from the lower layers to distinguish between connections to the service.
Rollover cable
A. performance degradation b. security issues c. host identification
A. HTTP b. HTTPS

41. What command is used to change the default name to 'Costas'?
0 to 1023
Router(config)# hostname Costas
Binary ANDing
Supports error detection.

42. What are 3 pieces of info about a route contained in a routing table?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
To enable a receiving host to forward the data to the appropriate application.
A. next-hop b. metric/interface c. destination network address
Is used by the server to resolve names.

43. 2 characteristics of clients in data networks
To prevent the receiver from being overwhelmed by incoming data.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. they initiate data exchanges b. they may upload data to servers
Source and Destination Ports

44. What is a disadvantage of Telnet?
It does not support encryption.
A. DB 60 b. Winchester 15-pin c. smart serial
Network
To facilitate the entry and exit of data on media.

45. 3 measures of data transfer
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. goodput b. throughput c. bandwidth
A. hot keys b. context-sensitive c. command syntax check
A. perform degradation b. security issues c. host identification

46. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
The physical address is added.
It reduces unnecessary broadcasts.

47. What can get you to an outside network?
A. low overhead b. connectionless
A default gateway (router).
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
No collisions will occur on this link.

48. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
SMB
They must wait until the first hosts finish transfering the media.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

49. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
No collisions will occur on this link.
Originate data flow.
A random delay helps prevent the stations from experiencing another collision during transmission.
A. application b. services

50. What type of network cable is used between a terminal and a console port?
Rollover cable
Collisions can decrease network performance.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
It provides interface between applications on either end of the network.