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. Default Gateway is incorrect on the host - What is the impact on the communications?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Is used by the server to resolve names.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
DNS

2. Which IP packet field will prevent endless loops?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
A. they initiate data exchanges b. they may upload data to servers
Time-to-live (TTL)
It provides for the exchange of data over a common local media.

3. 3 primary functions of the data link layer encapsulation
When connecting a host to a switch.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. addressing b. error detection c. frame delimiting
The physical address is added.

4. When is a straight-through cable used in a network?
To prevent the receiver from being overwhelmed by incoming data.
Logical Link Control sublayer
Minimal delays in data delivery.
When connecting a host to a switch.

5. 3 terms that define the forms of help available within the Cisco IOS
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
It uses support from the lower layers to distinguish between connections to the service.
A. hot keys b. context-sensitive c. command syntax check

6. 3 measures of data transfer
To enable a receiving host to forward the data to the appropriate application.
A. goodput b. throughput c. bandwidth
Network Access
A. perform degradation b. security issues c. host identification

7. 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?
FTP
Host A
Hub
Window Size

8. What is a protocol that provides connectionless network layer services?
IP Protocol
Static
Fiber
Network Layer Packet

9. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
A. enable mode b. priviledge executive mode
A physical topology.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

10. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Fiber

11. When a network service fails - which port is most often used to access a router for management purposes?
0 to 1023
A. application b. services
Console
A. flow control b. session establishment c. numbering and sequencing

12. When destination network is not in the routing table - What are 2 actions the router might take?
Wireless
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
DNS

13. 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.
OTDR
SSH
A. perform degradation b. security issues c. host identification

14. 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
Network Media Control
Host A
Time-to-live (TTL)

15. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Physical
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Rollover cable

16. What can be a problem that is reduced by adding end-to-end addressing?
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
Resolve IPv4 addresses to MAC addresses.
It reduces unnecessary broadcasts.
A. application b. presentation c. session d. transmision e. network f. data link g. physical

17. What event occurs during the 3-way handshake?
TCP initializes the sequence numbers for the sessions.
The MAC protocol can be very simple.
Router(config)# hostname Costas
A. identifies the communicating applications b. identifies multiple conversations between the hosts

18. If you have a small network w/ 3 computers...
IP is not properly installed
A default gateway (router).
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. Physical b. Data Link

19. What is the primary purpose of Layer 4?
UTP
Identify processes or services that are communicating with end devices.
Router(config)# interface FastEthernet 0/1
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

20. 3 characteristics of valid Ethernet Layer 2 addresses
Twisting of the cables
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Physical
A. show startup-config b. show running-config

21. Which device is used to create or divide broadcast domains?
A. goodput b. throughput c. bandwidth
Router
Network Access
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

22. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A physical topology.
Next-Hop Address
A. hot keys b. context-sensitive c. command syntax check
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

23. What is the purpose of a default gateway?
Router(config)# hostname Costas
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Host A
Identify the device that allows local network computers to communicate w/ devices in other networks.

24. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. show startup-config b. show running-config
A. DB 60 b. Winchester 15-pin c. smart serial
A. replace a switch w/ a router b. subnet the new networks
UDP

25. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Console
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Supports error detection.
A. next-hop b. metric/interface c. destination network address

26. What do you need to use for an initial configuration on a Cisco router?
Console interface
A. media sharing b. logical topology
UTP
It uses lasers as the light source.

27. What networking devices are recommended to be assigned static IP addresses?
32 bits
When connecting a host to a switch.
A. servers b. routers c. network printers
A. router b. firewall

28. In business LANs - which connector is used w/ twisted-pair networking cable?
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
Fiber
Host A
RJ-45

29. What makes fiber preferable to copper for interconnecting buildings?
No collisions will occur on this link.
32 bits
To prevent the receiver from being overwhelmed by incoming data.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

30. What type of network cable is used between a terminal and a console port?
Rollover cable
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. MTA b. SMTP
Wireless

31. Why are port numbers included in the TCP header of a segment?
Switch
To enable a receiving host to forward the data to the appropriate application.
Time-to-live (TTL)
A. low overhead b. connectionless

32. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A physical topology.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

33. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. Cat5 UTP b. Cat6 UTP
Destination Network Address
RJ-45
It provides interface between applications on either end of the network.

34. 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?
Window Size
SMB
2046
Static

35. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
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
Flash
A random delay helps prevent the stations from experiencing another collision during transmission.
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

36. What are 3 properties of contention-based media access for a shared media?
OTDR
Console interface
A. non-deterministic b. less overhead c. collisions exist
Source and Destination Ports

37. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. DNS b. SMTP c. POP
A. physical layer b. DLL layer
Ctrl + Shift + 6
A. enable mode b. priviledge executive mode

38. 2 features that make switches preferable to hubs
A. minimizing of collisions b. division into broadcast domains
Network Media Control
It has expanded adressing capabilities.
0 to 1023

39. When a device is moved from one network to the other...?
Next-Hop Address
Console
The destination host address.
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

40. An admin needs to keep contents private - which access method should he use?
32 bits
Static
SSH
The MAC protocol can be very simple.

41. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Is a layer of specific encapsulation.
Router(config)# interface FastEthernet 0/1
IP Protocol
Console

42. Network Protocols
The address of the router that the host will use to 'get to the other side'.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Create signals that represent the bits in each frame for the media.
UTP

43. What is a drawback of the CSMA/CD access method?
Network address
2046
They must wait until the first hosts finish transfering the media.
Collisions can decrease network performance.

44. What are 2 protocols for transfering web resources?
A. HTTP b. HTTPS
Hub
0 to 1023
They must wait until the first hosts finish transfering the media.

45. What device can check for faults - integrity and performance of media?
OTDR
Console interface
A. larger address space b. data types and classes of service c. authentication and encryption
As the commands are entered.

46. Which combination of keys can be used to interrupt a ping or traceroute process?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Network Media Control
Network Access
Ctrl + Shift + 6

47. 3 features of IPv6
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. larger address space b. data types and classes of service c. authentication and encryption
A. flow control b. session establishment c. numbering and sequencing
UTP

48. 2 most commonly used media types in ethernet networks
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Console interface
RJ-45
A. copper UTP b. optical fiber

49. What are the advantages of using a client-server model?
Rollover cable
172.16.192.160
A. they initiate data exchanges b. they may upload data to servers
A. it has centralized administration b. security is easier to enforce

50. What is PDU?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Twisting of the cables
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Is a layer of specific encapsulation.