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 causes crosstalk within cable pairs when using UTP?
The magnetic field around the adjacent pairs of wire.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Twisting of the cables
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

2. What correctly describes a MAC address?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
255.255.255.0
A. HTTP b. HTTPS
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

3. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
Console
A. purpose b. geographic location c. ownership
Router
UTP

4. What command can be used to determine if the router has experienced any input or output errors?
A. performance degradation b. security issues c. host identification
Show Interfaces
A. show startup-config b. show running-config
To enable a receiving host to forward the data to the appropriate application.

5. 3 functions of the upper data link sublayer in the OSI model
The physical address is added.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
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

6. Network Protocols
IP is not properly installed
No collisions will occur on this link.
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

7. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Minimal delays in data delivery.
Time-to-live (TTL)
Physical
Hosts return to listen-before-transmit mode.

8. 3 facts about the network portion of an IPv4 address
Source Port
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Router
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

9. What is the function of the DLL?
To facilitate the entry and exit of data on media.
It provides for the exchange of data over a common local media.
A. minimizing of collisions b. division into broadcast domains
255.255.255.0

10. What do end devices do?
IP is not properly installed
UTP
Source Port
Originate data flow.

11. What describes the purpose of default route?
A random delay helps prevent the stations from experiencing another collision during transmission.
SMB
Network address
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

12. What info is found in the TCP and UDP header info?
To enable a receiving host to forward the data to the appropriate application.
Is a layer of specific encapsulation.
Source and Destination Ports
Rollover cable

13. 3 protocols that operate in the application layer
The MAC protocol can be very simple.
A. DNS b. SMTP c. POP
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

14. 3 statements about the role of routers in the network
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
To facilitate the entry and exit of data on media.
Window Size

15. If you have a full-duplex operational network - what can happen?
Console
The packets will be delivered and reassembled at destination.
Network
No collisions will occur on this link.

16. Which device is used to create or divide 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
Router
A. router b. firewall
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

17. 2 characteristics of peer-2-peer
To prevent the receiver from being overwhelmed by incoming data.
Signal loss can be experienced.
A default gateway (router).
A. decentralized resources b. resource sharing w/o a dedicated server

18. How does the application layer on a server process multiple client requests for services?
Source and Destination IP address
It uses support from the lower layers to distinguish between connections to the service.
SSH
Source and Destination Ports

19. When do changes take effect in a Cisco router?
As the commands are entered.
A. hot keys b. context-sensitive c. command syntax check
Network Layer
A. router b. firewall

20. Why are port numbers included in the TCP header of a segment?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
To enable a receiving host to forward the data to the appropriate application.
The MAC protocol can be very simple.
Window Size

21. 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. copper UTP b. optical fiber
A. perform degradation b. security issues c. host identification
A. show startup-config b. show running-config
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

22. What is a default gateway address?

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23. Group of hosts that have identical bit patterns in the high order bits of their addresses
Transport
Network
As the commands are entered.
A backbone cable.

24. What method of signal transmission uses radio waves to carry signals?
A. minimizing of collisions b. division into broadcast domains
Wireless
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

25. What is the proper order of the OSI Layers?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A physical topology.
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
32 bits

26. 3 common problems w/ a large network
A. performance degradation b. security issues c. host identification
Router
Destination is not contacted before a packet is sent.
Switch

27. 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?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
172.16.192.160
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

28. What is PDU?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Switch
Router(config)# hostname Costas
Is a layer of specific encapsulation.

29. Intermediary devices used to implement security between networks
A. router b. firewall
To enable a receiving host to forward the data to the appropriate application.
Destination Network Address
Static

30. 3 statements about routes and their use
A. goodput b. throughput c. bandwidth
Fiber
Signal loss can be experienced.
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

31. What are 3 pieces of info about a route contained in a routing table?
It reduces unnecessary broadcasts.
A. next-hop b. metric/interface c. destination network address
Static
255.255.255.224

32. What is an automated service that matches resource names w/ required IP addresses?
OTDR
Collisions can decrease network performance.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
DNS

33. At which layers of the OSI model does ethernet operate?
A random delay helps prevent the stations from experiencing another collision during transmission.
Network portion
A. replace a switch w/ a router b. subnet the new networks
A. physical layer b. DLL layer

34. What does the IEEE 802.2 standard represent in Ethernet technologies?
2046
Logical Link Control sublayer
TCP initializes the sequence numbers for the sessions.
Console

35. What is an effect of improperly applying a network cable connector?
Window Size
Signal loss can be experienced.
A. copper UTP b. optical fiber
No collisions will occur on this link.

36. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
172.16.192.160
A. hot keys b. context-sensitive c. command syntax check
Network Layer

37. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. non-deterministic b. less overhead c. collisions exist
UTP
UDP
To facilitate the entry and exit of data on media.

38. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
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
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. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

39. What is a protocol that provides connectionless network layer services?
Hub
A. non-deterministic b. less overhead c. collisions exist
IP Protocol
UTP

40. What do you need to use for an initial configuration on a Cisco router?
Show Interfaces
Network address
Console interface
IP Protocol

41. What event occurs during the 3-way handshake?
A. servers b. routers c. network printers
Host A
SSH
TCP initializes the sequence numbers for the sessions.

42. What is the role of MTA in handling email?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Wireless
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

43. Which 2 options represent Layer 4 addressing?
A. servers b. routers c. network printers
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. identifies the communicating applications b. identifies multiple conversations between the hosts
TCP initializes the sequence numbers for the sessions.

44. In business LANs - which connector is used w/ twisted-pair networking cable?
Is a layer of specific encapsulation.
The address of the router that the host will use to 'get to the other side'.
RJ-45
Flash

45. 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?
Hosts return to listen-before-transmit mode.
A. Cat5 UTP b. Cat6 UTP
They must wait until the first hosts finish transfering the media.
Host mobility

46. What are 2 protocols for transfering web resources?
A. HTTP b. HTTPS
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
SMB
The packets will be delivered and reassembled at destination.

47. What is the primary purpose of ARP?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Resolve IPv4 addresses to MAC addresses.
8

48. What device can check for faults - integrity and performance of 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
OTDR
RJ-45
Router

49. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Hosts return to listen-before-transmit mode.
Supports error detection.
A. decentralized resources b. resource sharing w/o a dedicated server
A. minimizing of collisions b. division into broadcast domains

50. Which type of cable is most often associated w/ fiber-optic cable?
A backbone cable.
A. servers b. routers c. network printers
A. flow control b. session establishment c. numbering and sequencing
A. performance degradation b. security issues c. host identification