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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 are key considering factors when grouping hosts into common networks?
Originate data flow.
A. purpose b. geographic location c. ownership
DNS
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

2. What can you identify when you examine the Network Layer header?
A physical topology.
Network
The destination host address.
Host A

3. During a TCP session - if packets arrive out of order - what will happen?
TCP initializes the sequence numbers for the sessions.
Any device whose backoff timer expires first.
A. addressing b. error detection c. frame delimiting
The packets will be delivered and reassembled at destination.

4. What application layer protocol is used to support file transfers between client and server?
A. it has centralized administration b. security is easier to enforce
Network address
FTP
Network

5. 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?
172.16.192.160
As the commands are entered.
Switch
Time-to-live (TTL)

6. What describes the purpose of default route?
A. Cat5 UTP b. Cat6 UTP
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Router(config)# interface FastEthernet 0/1

7. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Source Port
Next-Hop Address
Binary ANDing
A. they initiate data exchanges b. they may upload data to servers

8. statements of IP adressing
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. the router will discard the packet b. the router will send a time exceeded message to the source host
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
SSH

9. During encapsulation - what happens in the Data Link Layer?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
To prevent the receiver from being overwhelmed by incoming data.
Logical Link Control sublayer
The physical address is added.

10. 3 statements about routes and their use
Network Layer Packet
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. 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. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

11. What is an automated service that matches resource names w/ required IP addresses?
Twisting of the cables
A default gateway (router).
DNS
Source and Destination Ports

12. 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?
2046
A. hot keys b. context-sensitive c. command syntax check
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

13. What device can check for faults - integrity and performance of media?
Router(config)# hostname Costas
OTDR
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. flow control b. session establishment c. numbering and sequencing

14. What is a component of a routing table entry?
Next-Hop Address
FTP
It has expanded adressing capabilities.
A. router b. firewall

15. If you have a full-duplex operational network - what can happen?
No collisions will occur on this link.
Identify the device that allows local network computers to communicate w/ devices in other networks.
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. DB 60 b. Winchester 15-pin c. smart serial

16. What is the role of MTA in handling email?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
To enable a receiving host to forward the data to the appropriate application.
SSH
Destination Network Address

17. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
Console interface
255.255.255.0
A. media sharing b. logical topology
A. physical layer b. DLL layer

18. What is the function of the DLL?
It does not support encryption.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
It provides for the exchange of data over a common local media.
FTP

19. What type of routing uses information that is manually entered into the routing table?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Static
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. low overhead b. connectionless

20. What is a default gateway address?

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21. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
A. goodput b. throughput c. bandwidth
A. purpose b. geographic location c. ownership
A. non-deterministic b. less overhead c. collisions exist
Network Layer Packet

22. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. larger address space b. data types and classes of service c. authentication and encryption
It uses lasers as the light source.
They must wait until the first hosts finish transfering the media.
Destination Network Address

23. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Supports error detection.
A. enable mode b. priviledge executive mode
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
FTP

24. Why are port numbers included in the TCP header of a segment?
It provides for the exchange of data over a common local media.
Console interface
To enable a receiving host to forward the data to the appropriate application.
A. flow control b. session establishment c. numbering and sequencing

25. What is a benefit of a WAN?
A. decentralized resources b. resource sharing w/o a dedicated server
2046
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
Host mobility

26. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. media sharing b. logical topology
Console interface
MAC
A. next-hop b. metric/interface c. destination network address

27. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
A. low overhead b. connectionless
8
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Transport

28. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A physical topology.
A. performance degradation b. security issues c. host identification
A random delay helps prevent the stations from experiencing another collision during transmission.
A. decentralized resources b. resource sharing w/o a dedicated server

29. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
IP is not properly installed
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
Application Layer
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

30. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
A. netstat -r b. route PRINT
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
When connecting a host to a switch.
255.255.255.224

31. 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
IP is not properly installed
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Rollover cable
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

32. 3 measures of data transfer
Logical Link Control sublayer
Fiber
A. goodput b. throughput c. bandwidth
Show Interfaces

33. What is the purpose of the TCP/IP Network Application Layer?
Static
It uses lasers as the light source.
Network Media Control
A. it has centralized administration b. security is easier to enforce

34. 2 most commonly used media types in ethernet networks
A. copper UTP b. optical fiber
A. media sharing b. logical topology
A. non-deterministic b. less overhead c. collisions exist
Source Port

35. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
It uses lasers as the light source.
Static
Next-Hop Address
Network address

36. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
80 (HTTP)
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

37. Which 2 options represent Layer 4 addressing?
UTP
A. identifies the communicating applications b. identifies multiple conversations between the hosts
RJ-45
Collisions can decrease network performance.

38. What correctly describes a MAC address?
Router(config)# interface FastEthernet 0/1
To facilitate the entry and exit of data on media.
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

39. Network Protocols
Destination is not contacted before a packet is sent.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. the router will discard the packet b. the router will send a time exceeded message to the source host
They must wait until the first hosts finish transfering the media.

40. Group of hosts that have identical bit patterns in the high order bits of their addresses
UDP
Network address
Ctrl + Shift + 6
Network

41. If you have a small network w/ 3 computers...
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
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 physical topology.
To prevent the receiver from being overwhelmed by incoming data.

42. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Physical
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Show Interfaces

43. What is dinamically selected by the source host when forwarding data?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Source Port
Supports error detection.
A. hot keys b. context-sensitive c. command syntax check

44. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
The address of the router that the host will use to 'get to the other side'.
Host mobility
Hosts return to listen-before-transmit mode.

45. What is the primary function of encapsulating packets into frames?
A. next-hop b. metric/interface c. destination network address
A. DNS b. SMTP c. POP
To facilitate the entry and exit of data on media.
SSH

46. Important characteristic of UDP
IP is not properly installed
Destination is not contacted before a packet is sent.
Minimal delays in data delivery.
A. application b. services

47. What are 2 forms of application layer software?
A. media sharing b. logical topology
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. application b. services
A. servers b. routers c. network printers

48. When a network service fails - which port is most often used to access a router for management purposes?
To enable a receiving host to forward the data to the appropriate application.
A. it has centralized administration b. security is easier to enforce
Console
Rollover cable

49. What is the primary purpose of Layer 4?
Identify processes or services that are communicating with end devices.
A. enable mode b. priviledge executive mode
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. copper UTP b. optical fiber

50. Intermediary devices used to implement security between networks
Network Layer
A. larger address space b. data types and classes of service c. authentication and encryption
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. router b. firewall