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. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
A. hot keys b. context-sensitive c. command syntax check
They must wait until the first hosts finish transfering the media.
Network Layer Packet
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

2. What is a drawback of the CSMA/CD access method?
Any device whose backoff timer expires first.
It uses lasers as the light source.
Collisions can decrease network performance.
A. next-hop b. metric/interface c. destination network address

3. Why are port numbers included in the TCP header of a segment?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. perform degradation b. security issues c. host identification
Signal loss can be experienced.
To enable a receiving host to forward the data to the appropriate application.

4. What is dinamically selected by the source host when forwarding data?
Source Port
Identify processes or services that are communicating with end devices.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Collisions can decrease network performance.

5. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
Router(config)# hostname Costas
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Hub

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

7. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
A. replace a switch w/ a router b. subnet the new networks
As the commands are entered.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

8. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Network Layer Packet
255.255.255.0
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

9. What is the primary function of encapsulating packets into frames?
MAC
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
To facilitate the entry and exit of data on media.
Flash

10. What are 3 properties of contention-based media access for a shared media?
Resolve IPv4 addresses to MAC addresses.
A. non-deterministic b. less overhead c. collisions exist
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Destination Network Address

11. What causes crosstalk within cable pairs when using UTP?
A. DNS b. SMTP c. POP
No collisions will occur on this link.
The magnetic field around the adjacent pairs of wire.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

12. 3 features that allow TCP to realibly and accurately track the transmission of data
It does not support encryption.
Resolve IPv4 addresses to MAC addresses.
A. flow control b. session establishment c. numbering and sequencing
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

13. Which combination of keys can be used to interrupt a ping or traceroute process?
A default gateway (router).
Logical Link Control sublayer
Source Port
Ctrl + Shift + 6

14. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
RJ-45
Console interface
Wireless
A random delay helps prevent the stations from experiencing another collision during transmission.

15. 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?
The physical address is added.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
8
Identify the device that allows local network computers to communicate w/ devices in other networks.

16. What networking devices are recommended to be assigned static IP addresses?
It reduces unnecessary broadcasts.
A. addressing b. error detection c. frame delimiting
A. servers b. routers c. network printers
A backbone cable.

17. 2 characteristics of peer-2-peer
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. decentralized resources b. resource sharing w/o a dedicated server
To facilitate the entry and exit of data on 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

18. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. enable mode b. priviledge executive mode
It has expanded adressing capabilities.
Any device whose backoff timer expires first.
OTDR

19. 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?
Resolve IPv4 addresses to MAC addresses.
UDP
They must wait until the first hosts finish transfering the media.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

20. What is a characteristic of a logical point-to-point topology?
A. low overhead b. connectionless
A. DB 60 b. Winchester 15-pin c. smart serial
The MAC protocol can be very simple.
Fiber

21. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Static
255.255.255.224
80 (HTTP)
Supports error detection.

22. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
IP is not properly installed
A. flow control b. session establishment c. numbering and sequencing
Network portion

23. When do changes take effect in a Cisco router?
A. HTTP b. HTTPS
As the commands are entered.
Router
Host mobility

24. What is a component of a routing table entry?
It provides for the exchange of data over a common local media.
Supports error detection.
Next-Hop Address
172.16.192.160

25. What are 2 common characteristics associated w/ dynamic routing protocols?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
255.255.255.224
A random delay helps prevent the stations from experiencing another collision during transmission.

26. 3 common problems w/ a large network
When connecting a host to a switch.
Create signals that represent the bits in each frame for the media.
OTDR
A. performance degradation b. security issues c. host identification

27. When destination network is not in the routing table - What are 2 actions the router might take?
As the commands are entered.
It reduces unnecessary broadcasts.
MAC
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

28. What correctly describes a MAC address?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
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. decentralized resources b. resource sharing w/o a dedicated server
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

29. What do you need to use for an initial configuration on a Cisco router?
A. performance degradation b. security issues c. host identification
Console interface
Is a layer of specific encapsulation.
No collisions will occur on this link.

30. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
RJ-45
Identify processes or services that are communicating with end devices.
Network address

31. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
255.255.255.224
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. servers b. routers c. network printers
Is a layer of specific encapsulation.

32. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
SSH
Resolve IPv4 addresses to MAC addresses.

33. What can get you to an outside network?
A default gateway (router).
As the commands are entered.
Network Layer Packet
A. media sharing b. logical topology

34. What is the purpose of a default gateway?
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
8
Fiber

35. What are 2 forms of application layer software?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
FTP
8
A. application b. services

36. What is a protocol that provides connectionless network layer services?
Hub
As the commands are entered.
Network Layer Packet
IP Protocol

37. 3 statements about the role of routers in the network
Network Access
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. HTTP b. HTTPS
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

38. Default Gateway is incorrect on the host - What is the impact on the communications?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
When connecting a host to a switch.
Source Port

39. 3 statements of media acess control
Collisions can decrease network performance.
A. router b. firewall
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
Resolve IPv4 addresses to MAC addresses.

40. 3 statements about routes and their use
Static
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. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. media sharing b. logical topology

41. What do the intermediary devices in the network do?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
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
Wireless
OTDR

42. 3 terms that define the forms of help available within the Cisco IOS
A. hot keys b. context-sensitive c. command syntax check
It uses support from the lower layers to distinguish between connections to the service.
A. MTA b. SMTP
A. application b. presentation c. session d. transmision e. network f. data link g. physical

43. 3 facts about the network portion of an IPv4 address
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
TCP initializes the sequence numbers for the sessions.
The magnetic field around the adjacent pairs of wire.
A. physical layer b. DLL layer

44. What application layer protocol is used to support file transfers between client and server?
Logical Link Control sublayer
Rollover cable
FTP
A. the router will discard the packet b. the router will send a time exceeded message to the source host

45. 3 primary functions of the data link layer encapsulation
A. Cat5 UTP b. Cat6 UTP
A. hot keys b. context-sensitive c. command syntax check
FTP
A. addressing b. error detection c. frame delimiting

46. What are the advantages of using a client-server model?
A. show startup-config b. show running-config
A. it has centralized administration b. security is easier to enforce
80 (HTTP)
A. enable mode b. priviledge executive mode

47. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Host A
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Transport
A. purpose b. geographic location c. ownership

48. What do end devices do?
2046
Originate data flow.
Network address
Identify processes or services that are communicating with end devices.

49. Which type of cable is most often associated w/ fiber-optic cable?
A backbone cable.
A. low overhead b. connectionless
Logical Link Control sublayer
It does not support encryption.

50. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. Physical b. Data Link
Logical Link Control sublayer