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. Intermediary devices used to implement security between networks
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. router b. firewall
0 to 1023
Signal loss can be experienced.

2. Which characteristics describe fiber optic cable?
A. addressing b. error detection c. frame delimiting
Resolve IPv4 addresses to MAC addresses.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
MAC

3. If there is a graphic representation of a company network wiring and equipment - What is this called?
Is used by the server to resolve names.
Static
A physical topology.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

4. What layer encapsulates segments into packets?
A. perform degradation b. security issues c. host identification
Wireless
Network Layer
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

5. What command can be used to determine if the router has experienced any input or output errors?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A random delay helps prevent the stations from experiencing another collision during transmission.
Show Interfaces
A. replace a switch w/ a router b. subnet the new networks

6. 3 statements about the role of routers in the network
IP is not properly installed
Any device whose backoff timer expires first.
A. router b. firewall
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

7. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Hosts return to listen-before-transmit mode.
255.255.255.0

8. 2 most commonly used media types in ethernet networks
Switch
32 bits
A. copper UTP b. optical fiber
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

9. What is the purpose of the TCP/IP Network Application Layer?
Show Interfaces
Application Layer
Console interface
Network Media Control

10. 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
Network Layer Packet
Router(config)# interface FastEthernet 0/1
A. router b. firewall
A. the router will discard the packet b. the router will send a time exceeded message to the source host

11. When do changes take effect in a Cisco router?
As the commands are entered.
A. application b. services
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Destination is not contacted before a packet is sent.

12. What method of signal transmission uses radio waves to carry signals?
The magnetic field around the adjacent pairs of wire.
A. perform degradation b. security issues c. host identification
A random delay helps prevent the stations from experiencing another collision during transmission.
Wireless

13. An admin needs to keep contents private - which access method should he use?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
To facilitate the entry and exit of data on media.
SSH
The MAC protocol can be very simple.

14. There are too many broadcasts on switches - what can be done?
A. goodput b. throughput c. bandwidth
A. replace a switch w/ a router b. subnet the new networks
Flash
Network address

15. 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 router will discard the packet b. the router will send a time exceeded message to the source host
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Identify the device that allows local network computers to communicate w/ devices in other networks.
2046

16. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
MAC
Destination Network Address
When connecting a host to a switch.

17. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
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

18. What is the primary purpose of Layer 4?
Twisting of the cables
Application Layer
A. they initiate data exchanges b. they may upload data to servers
Identify processes or services that are communicating with end devices.

19. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. Cat5 UTP b. Cat6 UTP
Router
The destination host address.
A. enable mode b. priviledge executive mode

20. Important characteristic of UDP
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. replace a switch w/ a router b. subnet the new networks
Minimal delays in data delivery.

21. What is the proper order of the OSI Layers?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Router(config)# hostname Costas
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

22. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
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 random delay helps prevent the stations from experiencing another collision during transmission.
Is used by the server to resolve names.
A. Physical b. Data Link

23. Network Protocols
A. DB 60 b. Winchester 15-pin c. smart serial
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
The MAC protocol can be very simple.
A. flow control b. session establishment c. numbering and sequencing

24. What is a component of a routing table entry?
Console interface
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Next-Hop Address
A. application b. services

25. What is a drawback of the CSMA/CD access method?
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 discards the packet b. router forwards the packet out the interface indicated in the route entry
Collisions can decrease network performance.
A. MTA b. SMTP

26. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
Identify the device that allows local network computers to communicate w/ devices in other networks.
172.16.192.160
A physical topology.
Destination Network Address

27. Which layer supplies services and allows user interface?
Application Layer
DNS
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Originate data flow.

28. 3 properties of peer-2-peer applications
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
Any device whose backoff timer expires first.
Flash
A. performance degradation b. security issues c. host identification

29. What are 2 forms of application layer software?
A. application b. services
A. router b. firewall
TCP initializes the sequence numbers for the sessions.
A. goodput b. throughput c. bandwidth

30. What is a disadvantage of Telnet?
MAC
It does not support encryption.
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. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

31. 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.
Fiber
Create signals that represent the bits in each frame for the media.
Network Media Control

32. 3 terms that define the forms of help available within the Cisco IOS
Fiber
A. hot keys b. context-sensitive c. command syntax check
It does not support encryption.
A. media sharing b. logical topology

33. When a device is moved from one network to the other...?
A. minimizing of collisions b. division into broadcast domains
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Hosts return to listen-before-transmit mode.
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

34. 3 features that allow TCP to realibly and accurately track the transmission of data
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
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
UDP
A. flow control b. session establishment c. numbering and sequencing

35. 3 statements about routes and their use
A. Physical b. Data Link
It uses support from the lower layers to distinguish between connections to the service.
Create signals that represent the bits in each frame for the media.
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

36. What causes crosstalk within cable pairs when using UTP?
Network
The magnetic field around the adjacent pairs of wire.
No collisions will occur on this link.
8

37. What can get you to an outside network?
Source and Destination Ports
A default gateway (router).
Rollover cable
A. Physical b. Data Link

38. How does the application layer on a server process multiple client requests for services?
A. copper UTP b. optical fiber
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. DNS b. SMTP c. POP
It uses support from the lower layers to distinguish between connections to the service.

39. What does the IEEE 802.2 standard represent in Ethernet technologies?
Collisions can decrease network performance.
MAC
Logical Link Control sublayer
Identify the device that allows local network computers to communicate w/ devices in other networks.

40. What is the function of the DLL?
It provides for the exchange of data over a common local media.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Originate data flow.

41. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
A. decentralized resources b. resource sharing w/o a dedicated server
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Physical
Originate data flow.

42. What is an effect of improperly applying a network cable connector?
Console
A default gateway (router).
Signal loss can be experienced.
Physical

43. 3 functions of the upper data link sublayer in the OSI model
Network Access
A. minimizing of collisions b. division into broadcast domains
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Is a layer of specific encapsulation.

44. What is the primary rope of the physical layer in transmitting data?
A. enable mode b. priviledge executive mode
Logical Link Control sublayer
Create signals that represent the bits in each frame for the media.
Destination Network Address

45. Which portion of the network layer address does a router use to forward packets?
MAC
Network portion
A physical topology.
Resolve IPv4 addresses to MAC addresses.

46. 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.
The magnetic field around the adjacent pairs of wire.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
It reduces unnecessary broadcasts.

47. When is a straight-through cable used in a network?
When connecting a host to a switch.
Signal loss can be experienced.
To prevent the receiver from being overwhelmed by incoming data.
A. non-deterministic b. less overhead c. collisions exist

48. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Transport
A. purpose b. geographic location c. ownership
When connecting a host to a switch.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

49. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. Physical b. Data Link
Network address
Hosts return to listen-before-transmit mode.

50. At which layers of the OSI model does ethernet operate?
To enable a receiving host to forward the data to the appropriate application.
A. physical layer b. DLL layer
IP Protocol
RJ-45