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. How does the application layer on a server process multiple client requests for services?
Identify the device that allows local network computers to communicate w/ devices in other 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
It uses support from the lower layers to distinguish between connections to the service.
The magnetic field around the adjacent pairs of wire.

2. What are 2 protocols for transfering web resources?
RJ-45
A. HTTP b. HTTPS
A. non-deterministic b. less overhead c. collisions exist
It provides interface between applications on either end of the network.

3. What are 3 common problems w/ large networks?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. perform degradation b. security issues c. host identification
A. DB 60 b. Winchester 15-pin c. smart serial
Show Interfaces

4. What are 2 features of User Diagram Protocol (UDP)?
Minimal delays in data delivery.
255.255.255.224
Rollover cable
A. low overhead b. connectionless

5. What is a component of a routing table entry?
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
As the commands are entered.
Next-Hop Address
Application Layer

6. What information is added during encapsulation at OSI Layer 3?
A. router b. firewall
Host mobility
UDP
Source and Destination IP address

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?
Network Layer Packet
80 (HTTP)
Hosts return to listen-before-transmit mode.
A. perform degradation b. security issues c. host identification

8. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
2046
A. MTA b. SMTP
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

9. What does the IEEE 802.2 standard represent in Ethernet technologies?
Logical Link Control sublayer
Physical
Resolve IPv4 addresses to MAC addresses.
A. perform degradation b. security issues c. host identification

10. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Destination Network Address
It uses support from the lower layers to distinguish between connections to the service.
Router(config)# interface FastEthernet 0/1
A. Physical b. Data Link

11. What statements describe the logical token-passing topology?
To facilitate the entry and exit of data on media.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. DB 60 b. Winchester 15-pin c. smart serial

12. When do changes take effect in a Cisco router?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Rollover cable
As the commands are entered.
Identify processes or services that are communicating with end devices.

13. Which IP packet field will prevent endless loops?
Hub
A. Cat5 UTP b. Cat6 UTP
It does not support encryption.
Time-to-live (TTL)

14. How many bits make up an IPv4 address?
A random delay helps prevent the stations from experiencing another collision during transmission.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
32 bits
2046

15. 3 protocols that operate in the application layer
It reduces unnecessary broadcasts.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. addressing b. error detection c. frame delimiting
A. DNS b. SMTP c. POP

16. 3 characteristics of valid Ethernet Layer 2 addresses
Network Layer Packet
Destination Network Address
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Transport

17. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
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
Rollover cable

18. 3 statements about routes and their use
Minimal delays in data delivery.
Console
A. hot keys b. context-sensitive c. command syntax check
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

19. At which layer of the TCP/IP model does ethernet operate?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Network Access
Logical Link Control sublayer
Network Layer Packet

20. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
Network Layer Packet
Twisting of the cables
When connecting a host to a switch.

21. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Next-Hop Address
A. non-deterministic b. less overhead c. collisions exist
MAC
Fiber

22. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Collisions can decrease network performance.
To prevent the receiver from being overwhelmed by incoming data.
Network
0 to 1023

23. 3 features of IPv6
It provides interface between applications on either end of the network.
IP is not properly installed
FTP
A. larger address space b. data types and classes of service c. authentication and encryption

24. What is the primary rope of the physical layer in transmitting data?
A. Cat5 UTP b. Cat6 UTP
Create signals that represent the bits in each frame for the media.
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
RJ-45

25. At which layers of the OSI model does ethernet operate?
A physical topology.
A. decentralized resources b. resource sharing w/o a dedicated server
Twisting of the cables
A. physical layer b. DLL layer

26. What are 2 forms of application layer software?
A. application b. services
32 bits
UDP
Show Interfaces

27. Default Gateway is incorrect on the host - What is the impact on the communications?
FTP
Originate data flow.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

28. 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
Application Layer
Identify the device that allows local network computers to communicate w/ devices in other networks.
MAC

29. Important characteristic of UDP
Minimal delays in data delivery.
Host mobility
A. application b. services
Any device whose backoff timer expires first.

30. When a network service fails - which port is most often used to access a router for management purposes?
Console
32 bits
A. minimizing of collisions b. division into broadcast domains
RJ-45

31. What application layer protocol is used to support file transfers between client and server?
FTP
A physical topology.
A. non-deterministic b. less overhead c. collisions exist
Next-Hop Address

32. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Host A
A. next-hop b. metric/interface c. destination network address
Transport
Any device whose backoff timer expires first.

33. 3 factors that should be considered when implementing Layer 2 protocols
A. Physical b. Data Link
Window Size
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

34. What is a drawback of the CSMA/CD access method?
The address of the router that the host will use to 'get to the other side'.
Rollover cable
Collisions can decrease network performance.
Network Layer Packet

35. What can get you to an outside network?
A random delay helps prevent the stations from experiencing another collision during transmission.
Minimal delays in data delivery.
A default gateway (router).
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

36. When is a straight-through cable used in a network?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Router
When connecting a host to a switch.
Is a layer of specific encapsulation.

37. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
A. next-hop b. metric/interface c. destination network address
A. router b. firewall
Switch
It reduces unnecessary broadcasts.

38. What is the role of the OSI Application Layer?
Show Interfaces
They must wait until the first hosts finish transfering the media.
It provides interface between applications on either end of 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)

39. After an ethernet collision - which device has priority to transmit data?
MAC
32 bits
Any device whose backoff timer expires first.
Hub

40. 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?
It has expanded adressing capabilities.
2046
Signal loss can be experienced.
Any device whose backoff timer expires first.

41. 3 statements of media acess control
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
It uses lasers as the light source.
SMB
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

42. During encapsulation - what happens in the Data Link Layer?
It reduces unnecessary broadcasts.
It provides interface between applications on either end of the network.
Static
The physical address is added.

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

44. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. non-deterministic b. less overhead c. collisions exist
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
MAC

45. What is the primary function of encapsulating packets into frames?
MAC
SSH
To facilitate the entry and exit of data on media.
A. non-deterministic b. less overhead c. collisions exist

46. What networking devices are recommended to be assigned static IP addresses?
DNS
A. servers b. routers c. network printers
It uses lasers as the light source.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

47. 3 features that allow TCP to realibly and accurately track the transmission of data
It uses support from the lower layers to distinguish between connections to the service.
To enable a receiving host to forward the data to the appropriate application.
A. flow control b. session establishment c. numbering and sequencing
Host mobility

48. What is the purpose of resource records in DNS?
A. larger address space b. data types and classes of service c. authentication and encryption
Is used by the server to resolve names.
OTDR
A. identifies the communicating applications b. identifies multiple conversations between the hosts

49. What is an effect of improperly applying a network cable connector?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. application b. services
Signal loss can be experienced.
A. copper UTP b. optical fiber

50. There are too many broadcasts on switches - what can be done?
The physical address is added.
A. replace a switch w/ a router b. subnet the new networks
0 to 1023
A. show startup-config b. show running-config