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 do you need to use for an initial configuration on a Cisco router?
Time-to-live (TTL)
Show Interfaces
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Console interface

2. What makes fiber preferable to copper for interconnecting buildings?
A. Cat5 UTP b. Cat6 UTP
Console
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

3. What is the primary purpose of ARP?
Binary ANDing
Resolve IPv4 addresses to MAC addresses.
Source and Destination Ports
Rollover cable

4. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Console
It provides for the exchange of data over a common local media.
Switch

5. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Network
80 (HTTP)
A. hot keys b. context-sensitive c. command syntax check
Network Layer Packet

6. 2 most commonly used media types in ethernet networks
Network
Any device whose backoff timer expires first.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. copper UTP b. optical fiber

7. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
Destination is not contacted before a packet is sent.
Destination Network Address
Router(config)# hostname Costas
UTP

8. What is the primary function of encapsulating packets into frames?
To facilitate the entry and exit of data on media.
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
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

9. What describes the purpose of default route?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Destination Network Address
Hub
Transport

10. During encapsulation - what happens in the Data Link Layer?
Fiber
The physical address is added.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

11. What are 2 features of User Diagram Protocol (UDP)?
A default gateway (router).
Physical
IP is not properly installed
A. low overhead b. connectionless

12. What is a protocol that provides connectionless network layer services?
255.255.255.224
Any device whose backoff timer expires first.
IP Protocol
It provides interface between applications on either end of the network.

13. 2 characteristics of clients in data networks
A. performance degradation b. security issues c. host identification
A. they initiate data exchanges b. they may upload data to servers
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Is used by the server to resolve names.

14. What is the role of the OSI Application Layer?
The address of the router that the host will use to 'get to the other side'.
A. hot keys b. context-sensitive c. command syntax check
A. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device
It provides interface between applications on either end of the network.

15. What causes crosstalk within cable pairs when using UTP?
The magnetic field around the adjacent pairs of wire.
2046
A. enable mode b. priviledge executive mode
MAC

16. 3 terms that define the forms of help available within the Cisco IOS
IP is not properly installed
A. next-hop b. metric/interface c. destination network address
To enable a receiving host to forward the data to the appropriate application.
A. hot keys b. context-sensitive c. command syntax check

17. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
A random delay helps prevent the stations from experiencing another collision during transmission.
IP Protocol
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

18. Which IP packet field will prevent endless loops?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Host A
Time-to-live (TTL)
Destination is not contacted before a packet is sent.

19. 3 characteristics of valid Ethernet Layer 2 addresses
IP is not properly installed
A. replace a switch w/ a router b. subnet the new networks
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. physical layer b. DLL layer

20. What are 3 properties of contention-based media access for a shared media?
A. non-deterministic b. less overhead c. collisions exist
A. replace a switch w/ a router b. subnet the new networks
Network portion
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

21. If you have a full-duplex operational network - what can happen?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
No collisions will occur on this link.
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. MTA b. SMTP

22. What 2 type of cables would most commonly be used for new runs?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. physical layer b. DLL layer
A. Cat5 UTP b. Cat6 UTP

23. 3 statements about the role of routers in the network
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. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
2046
A. performance degradation b. security issues c. host identification

24. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
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. netstat -r b. route PRINT
A. Physical b. Data Link

25. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. low overhead b. connectionless
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. hot keys b. context-sensitive c. command syntax check
A. DB 60 b. Winchester 15-pin c. smart serial

26. 3 facts about the network portion of an IPv4 address
Minimal delays in data delivery.
Collisions can decrease network performance.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. identifies the communicating applications b. identifies multiple conversations between the hosts

27. What is the primary purpose of Layer 4?
Host A
Hosts return to listen-before-transmit mode.
Identify processes or services that are communicating with end devices.
To facilitate the entry and exit of data on media.

28. After a routers ends its boot sequence - the admin wants to check the routers config. From the EXEC mode - which commands can the admin use?
A. they initiate data exchanges b. they may upload data to servers
A. minimizing of collisions b. division into broadcast domains
A. show startup-config b. show running-config
A. application b. services

29. What networking devices are recommended to be assigned static IP addresses?
Router
Console
A. servers b. routers c. network printers
A. performance degradation b. security issues c. host identification

30. How does the application layer on a server process multiple client requests for services?
A. performance degradation b. security issues c. host identification
The MAC protocol can be very simple.
It uses support from the lower layers to distinguish between connections to the service.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

31. What is the purpose of a default gateway?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
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
172.16.192.160
Identify the device that allows local network computers to communicate w/ devices in other networks.

32. What are 2 commands used to view a host routing table?
Is a layer of specific encapsulation.
Static
A. netstat -r b. route PRINT
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

33. How many host addresses can be assigned to a subnetwork when using the 130.68.0.0 network address w/ a subnet mask of 255.255.248.0?
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
2046
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Console interface

34. What are 3 pieces of info about a route contained in a routing table?
Wireless
Hosts return to listen-before-transmit mode.
A. next-hop b. metric/interface c. destination network address
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

35. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
Network Media Control
A. purpose b. geographic location c. ownership
DNS

36. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. enable mode b. priviledge executive mode
IP is not properly installed
OTDR
RJ-45

37. What do end devices do?
Originate data flow.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Network portion
It provides for the exchange of data over a common local media.

38. What is a component of a routing table entry?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
172.16.192.160
Any device whose backoff timer expires first.
Next-Hop Address

39. What event occurs during the 3-way handshake?
TCP initializes the sequence numbers for the sessions.
SMB
As the commands are entered.
Time-to-live (TTL)

40. What command is used to change the default name to 'Costas'?
Network Access
It uses lasers as the light source.
Router(config)# hostname Costas
Is a layer of specific encapsulation.

41. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
A. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device
A. router b. firewall
A. decentralized resources b. resource sharing w/o a dedicated server

42. Why is flow control used for TCP data transfer?
Next-Hop Address
A. DNS b. SMTP c. POP
To prevent the receiver from being overwhelmed by incoming data.
Source and Destination Ports

43. What is a benefit of a WAN?
Any device whose backoff timer expires first.
A. application b. services
Host mobility
A. Physical b. Data Link

44. What kind of problems are caused by excessive broadcast traffic on network segments?
RJ-45
A. non-deterministic b. less overhead c. collisions exist
80 (HTTP)
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

45. Which 2 options represent Layer 4 addressing?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Console interface
Network Access
A. identifies the communicating applications b. identifies multiple conversations between the hosts

46. There are too many broadcasts on switches - what can be done?
A. replace a switch w/ a router b. subnet the new networks
A random delay helps prevent the stations from experiencing another collision during transmission.
Network Layer
Network Media Control

47. What correctly describes a MAC address?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Show Interfaces
A. performance degradation b. security issues c. host identification
A. application b. services

48. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
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
Flash
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. application b. presentation c. session d. transmision e. network f. data link g. physical

49. 3 statements of media acess control
Hosts return to listen-before-transmit mode.
Flash
Network Media Control
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

50. At which layers of the OSI model does ethernet operate?
A. physical layer b. DLL layer
Network Access
A physical topology.
Binary ANDing