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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 primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
IP is not properly installed
A. servers b. routers c. network printers

2. What do the intermediary devices in the network do?
FTP
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. application b. services
A default gateway (router).

3. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
The address of the router that the host will use to 'get to the other side'.
RJ-45
Fiber
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

4. What is the purpose of resource records in DNS?
Network portion
Identify processes or services that are communicating with end devices.
Is used by the server to resolve names.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

5. What is an automated service that matches resource names w/ required IP addresses?
0 to 1023
OTDR
DNS
172.16.192.160

6. What are the advantages of using a client-server model?
A. application b. services
A. low overhead b. connectionless
A. it has centralized administration b. security is easier to enforce
Ctrl + Shift + 6

7. What can you identify when you examine the Network Layer header?
The destination host address.
Network Layer
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Host mobility

8. What are 2 forms of application layer software?
A. application b. services
A default gateway (router).
A. performance degradation b. security issues c. host identification
A. netstat -r b. route PRINT

9. 3 factors that should be considered when implementing Layer 2 protocols
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Rollover cable
Network Layer Packet
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

10. When is a straight-through cable used in a network?
A. copper UTP b. optical fiber
Identify processes or services that are communicating with end devices.
It reduces unnecessary broadcasts.
When connecting a host to a switch.

11. 3 statements about routes and their use
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
Binary ANDing
80 (HTTP)
Supports error detection.

12. What is the primary reason for developing IPv6?
The physical address is added.
A. larger address space b. data types and classes of service c. authentication and encryption
It has expanded adressing capabilities.
The packets will be delivered and reassembled at destination.

13. What do end devices do?
The address of the router that the host will use to 'get to the other side'.
A physical topology.
Originate data flow.
A. application b. services

14. 3 protocols that operate in the application layer
Source Port
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. DNS b. SMTP c. POP
Identify the device that allows local network computers to communicate w/ devices in other networks.

15. Which 2 options represent Layer 4 addressing?
Network address
Source Port
It provides for the exchange of data over a common local media.
A. identifies the communicating applications b. identifies multiple conversations between the hosts

16. What correctly describes a MAC address?
UDP
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Is a layer of specific encapsulation.
No collisions will occur on this link.

17. What device can check for faults - integrity and performance of media?
OTDR
A. media sharing b. logical topology
It provides for the exchange of data over a common local media.
Fiber

18. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
80 (HTTP)
Network address
Identify the device that allows local network computers to communicate w/ devices in other networks.
Logical Link Control sublayer

19. 3 common problems w/ a large network
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Is a layer of specific encapsulation.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. performance degradation b. security issues c. host identification

20. What is the role of MTA in handling email?
The address of the router that the host will use to 'get to the other side'.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
To facilitate the entry and exit of data on media.
RJ-45

21. Default Gateway is incorrect on the host - What is the impact on the communications?
Switch
When connecting a host to a switch.
SSH
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

22. Intermediary devices used to implement security between networks
Router
Source Port
A. router b. firewall
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

23. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Router
Hub
A. HTTP b. HTTPS
Identify processes or services that are communicating with end devices.

24. 3 properties of peer-2-peer applications
Identify the device that allows local network computers to communicate w/ devices in other networks.
Hub
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

25. 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?
8
A. netstat -r b. route PRINT
The address of the router that the host will use to 'get to the other side'.
It provides for the exchange of data over a common local media.

26. In business LANs - which connector is used w/ twisted-pair networking cable?
Network Media Control
RJ-45
Hub
Source and Destination IP address

27. 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. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. media sharing b. logical topology
2046
Host A

28. What command can be used to determine if the router has experienced any input or output errors?
Binary ANDing
Fiber
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Show Interfaces

29. What type of routing uses information that is manually entered into the routing table?
A. DB 60 b. Winchester 15-pin c. smart serial
Router(config)# interface FastEthernet 0/1
Signal loss can be experienced.
Static

30. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Physical
A random delay helps prevent the stations from experiencing another collision during transmission.
Router(config)# interface FastEthernet 0/1
A. HTTP b. HTTPS

31. There are too many broadcasts on switches - what can be done?
Network
Wireless
A. replace a switch w/ a router b. subnet the new networks
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

32. 2 features that make switches preferable to hubs
A. minimizing of collisions b. division into broadcast domains
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. hot keys b. context-sensitive c. command syntax check
Console

33. When destination network is not in the routing table - What are 2 actions the router might take?
Hosts return to listen-before-transmit mode.
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
Physical
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

34. What networking devices are recommended to be assigned static IP addresses?
A. MTA b. SMTP
Host mobility
IP is not properly installed
A. servers b. routers c. network printers

35. How does the application layer on a server process multiple client requests for services?
Source Port
Wireless
It uses support from the lower layers to distinguish between connections to the service.
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

36. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A random delay helps prevent the stations from experiencing another collision during transmission.
Window Size
A backbone cable.
Minimal delays in data delivery.

37. Which combination of keys can be used to interrupt a ping or traceroute process?
Ctrl + Shift + 6
Wireless
No collisions will occur on this link.
They must wait until the first hosts finish transfering the media.

38. 2 functions of encapsulation
A. they initiate data exchanges b. they may upload data to servers
As the commands are entered.
It does not support encryption.
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

39. Which type of cable is most often associated w/ fiber-optic cable?
A. netstat -r b. route PRINT
A backbone cable.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Supports error detection.

40. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Network address
A. physical layer b. DLL layer
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
UDP

41. What is the primary function of encapsulating packets into frames?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. HTTP b. HTTPS
To facilitate the entry and exit of data on media.
It uses lasers as the light source.

42. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Supports error detection.
Any device whose backoff timer expires first.

43. Why is flow control used for TCP data transfer?
0 to 1023
The MAC protocol can be very simple.
To prevent the receiver from being overwhelmed by incoming data.
As the commands are entered.

44. What is a characteristic of a logical point-to-point topology?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
The MAC protocol can be very simple.
Rollover cable
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

45. 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?
RJ-45
Host A
Network Layer
Destination is not contacted before a packet is sent.

46. What can be a problem that is reduced by adding end-to-end addressing?
Network Layer Packet
A. next-hop b. metric/interface c. destination network address
It provides for the exchange of data over a common local media.
It reduces unnecessary broadcasts.

47. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
The destination host address.
Destination Network Address
A. minimizing of collisions b. division into broadcast domains
Is a layer of specific encapsulation.

48. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A default gateway (router).
Application Layer
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
MAC

49. Which characteristics describe fiber optic cable?
SMB
Router
A. copper UTP b. optical fiber
A. not affected by EMI of RFI b. most expensive type of LAN cabling

50. What command is used to change the default name to 'Costas'?
A backbone cable.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Router(config)# hostname Costas
Rollover cable