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 primary purpose of Layer 4?
Identify processes or services that are communicating with end devices.
Network Access
Identify the device that allows local network computers to communicate w/ devices in other networks.
The physical address is added.

2. What are key considering factors when grouping hosts into common networks?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. purpose b. geographic location c. ownership
Originate data flow.
A. not affected by EMI of RFI b. most expensive type of LAN cabling

3. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
0 to 1023
Application Layer
255.255.255.224
When connecting a host to a switch.

4. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. hot keys b. context-sensitive c. command syntax check
Network
A. servers b. routers c. network printers
A. Physical b. Data Link

5. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. hot keys b. context-sensitive c. command syntax check
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

6. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. HTTP b. HTTPS
Hosts return to listen-before-transmit mode.
A. router b. firewall
Console interface

7. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
A. Physical b. Data Link
A. addressing b. error detection c. frame delimiting
Show Interfaces
80 (HTTP)

8. During encapsulation - what happens in the Data Link Layer?
Wireless
The physical address is added.
A. DB 60 b. Winchester 15-pin c. smart serial
Flash

9. 3 terms that define the forms of help available within the Cisco IOS
A. hot keys b. context-sensitive c. command syntax check
Fiber
255.255.255.0
A. non-deterministic b. less overhead c. collisions exist

10. 2 characteristics of clients in data networks
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
A. application b. presentation c. session d. transmision e. network f. data link g. physical
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 initiate data exchanges b. they may upload data to servers

11. 2 things that will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away
Twisting of the cables
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. low overhead b. connectionless
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

12. What are 2 forms of application layer software?
Source and Destination IP address
2046
A. application b. services
The physical address is added.

13. What info is found in the TCP and UDP header info?
Source and Destination Ports
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Console
0 to 1023

14. To make a console connection from a comp to a Cisco router - what cable should be used?
Host mobility
Rollover cable
Supports error detection.
Logical Link Control sublayer

15. What networking devices are recommended to be assigned static IP addresses?
A. it has centralized administration b. security is easier to enforce
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
No collisions will occur on this link.
A. servers b. routers c. network printers

16. What are 3 common problems w/ large networks?
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. perform degradation b. security issues c. host identification
It does not support encryption.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

17. What statements describe the logical token-passing topology?
Console
Ctrl + Shift + 6
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

18. 3 common problems w/ a large network
A. application b. services
Source and Destination Ports
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. performance degradation b. security issues c. host identification

19. When destination network is not in the routing table - What are 2 actions the router might take?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
It provides for the exchange of data over a common local media.
Identify the device that allows local network computers to communicate w/ devices in other networks.
Network Access

20. Why are port numbers included in the TCP header of a segment?
Network Layer Packet
Router
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
To enable a receiving host to forward the data to the appropriate application.

21. What can you identify when you examine the Network Layer header?
8
It reduces unnecessary broadcasts.
The destination host address.
A. replace a switch w/ a router b. subnet the new networks

22. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
172.16.192.160
Physical
A. application b. services
It uses support from the lower layers to distinguish between connections to the service.

23. What characteristic of an UTP helps reduce interference?
Switch
Window Size
Logical Link Control sublayer
Twisting of the cables

24. 3 features of IPv6
A. they initiate data exchanges b. they may upload data to servers
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
Network portion
A. larger address space b. data types and classes of service c. authentication and encryption

25. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
IP is not properly installed
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

26. If you have a full-duplex operational network - what can happen?
A. hot keys b. context-sensitive c. command syntax check
DNS
No collisions will occur on this link.
To facilitate the entry and exit of data on media.

27. What is the primary function of encapsulating packets into frames?
Network address
As the commands are entered.
To facilitate the entry and exit of data on media.
A. Physical b. Data Link

28. statements of IP adressing
Is a layer of specific encapsulation.
A. non-deterministic b. less overhead c. collisions exist
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. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

29. Which device is used to create or divide broadcast domains?
Router
A. copper UTP b. optical fiber
SSH
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

30. What device can check for faults - integrity and performance of media?
80 (HTTP)
Hub
Router(config)# interface FastEthernet 0/1
OTDR

31. What method of signal transmission uses radio waves to carry signals?
Host mobility
UTP
Wireless
Originate data flow.

32. What is a characteristic of a single-mode fiber-optic cable?
It uses lasers as the light source.
It provides interface between applications on either end of the network.
2046
OTDR

33. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
A. next-hop b. metric/interface c. destination network address
A. copper UTP b. optical fiber
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

34. What layer encapsulates segments into packets?
Network Media Control
Network Layer
Network
The magnetic field around the adjacent pairs of wire.

35. What is the purpose of a default gateway?
It does not support encryption.
Identify the device that allows local network computers to communicate w/ devices in other networks.
It uses support from the lower layers to distinguish between connections to the service.
A. performance degradation b. security issues c. host identification

36. When a device is moved from one network to the other...?
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. goodput b. throughput c. bandwidth
Transport
Network Access

37. 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. show startup-config b. show running-config
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. it has centralized administration b. security is easier to enforce
A random delay helps prevent the stations from experiencing another collision during transmission.

38. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
A. performance degradation b. security issues c. host identification
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Switch
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

39. 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.
Network Access
A. application b. services
It reduces unnecessary broadcasts.

40. An admin needs to keep contents private - which access method should he use?
SSH
Network address
Console interface
The physical address is added.

41. What determines the method of media access control?
SMB
A. copper UTP b. optical fiber
A. media sharing b. logical topology
Identify the device that allows local network computers to communicate w/ devices in other networks.

42. Which type of cable is most often associated w/ fiber-optic cable?
Network Layer
A backbone cable.
Host mobility
A. physical layer b. DLL layer

43. How does the application layer on a server process multiple client requests for services?
Show Interfaces
It uses support from the lower layers to distinguish between connections to the service.
To prevent the receiver from being overwhelmed by incoming data.
A. netstat -r b. route PRINT

44. Which 2 options represent Layer 4 addressing?
A. addressing b. error detection c. frame delimiting
A. identifies the communicating applications b. identifies multiple conversations between the hosts
As the commands are entered.
Hosts return to listen-before-transmit mode.

45. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
No collisions will occur on this link.
A. performance degradation b. security issues c. host identification
Static
UDP

46. What makes fiber preferable to copper for interconnecting buildings?
8
The physical address is added.
0 to 1023
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

47. 3 statements of media acess control
A. decentralized resources b. resource sharing w/o a dedicated server
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
The address of the router that the host will use to 'get to the other side'.
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

48. There are 4 different hosts connected to a hub - media is being transfered between 2 of them but the other 2 will also like to transfer media. What must the latest hosts do to transfer the media?
They must wait until the first hosts finish transfering the media.
UDP
Network Layer Packet
255.255.255.224

49. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
Supports error detection.
A. servers b. routers c. network printers
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

50. Important characteristic of UDP
UDP
Minimal delays in data delivery.
A. show startup-config b. show running-config
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