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CCNA - 2

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
UDP

2. What application layer protocol is used to support file transfers between client and server?
A. Cat5 UTP b. Cat6 UTP
FTP
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

3. When destination network is not in the routing table - What are 2 actions the router might take?
Show Interfaces
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. larger address space b. data types and classes of service c. authentication and encryption
The packets will be delivered and reassembled at destination.

4. What is the primary purpose of ARP?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Minimal delays in data delivery.
A. minimizing of collisions b. division into broadcast domains
Resolve IPv4 addresses to MAC addresses.

5. What are the advantages of using a client-server model?
A. minimizing of collisions b. division into broadcast domains
A. it has centralized administration b. security is easier to enforce
A. purpose b. geographic location c. ownership
Logical Link Control sublayer

6. During a TCP session - if packets arrive out of order - what will happen?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. addressing b. error detection c. frame delimiting
Source Port
The packets will be delivered and reassembled at destination.

7. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Destination Network Address
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. hot keys b. context-sensitive c. command syntax check
They must wait until the first hosts finish transfering the media.

8. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
The destination host address.
A. Physical b. Data Link
To prevent the receiver from being overwhelmed by incoming data.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

9. When a network service fails - which port is most often used to access a router for management purposes?
Signal loss can be experienced.
MAC
Console
80 (HTTP)

10. statements of IP adressing
A. netstat -r b. route PRINT
OTDR
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
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

11. What command can be used to determine if the router has experienced any input or output errors?
FTP
Show Interfaces
The packets will be delivered and reassembled at destination.
Router

12. What is a disadvantage of Telnet?
It does not support encryption.
MAC
It provides interface between applications on either end of the network.
A. Cat5 UTP b. Cat6 UTP

13. After an ethernet collision - which device has priority to transmit data?
The packets will be delivered and reassembled at destination.
A. DNS b. SMTP c. POP
Any device whose backoff timer expires first.
A default gateway (router).

14. Where is the IOS file stored at?
Collisions can decrease network performance.
Time-to-live (TTL)
Flash
Rollover cable

15. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
OTDR
MAC
A. enable mode b. priviledge executive mode

16. 2 characteristics of clients in data networks
Create signals that represent the bits in each frame for the media.
A. show startup-config b. show running-config
A. they initiate data exchanges b. they may upload data to servers
0 to 1023

17. What characteristic of an UTP helps reduce interference?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Twisting of the cables
Ctrl + Shift + 6
Router(config)# interface FastEthernet 0/1

18. What is the role of the OSI Application Layer?
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
Time-to-live (TTL)
It provides interface between applications on either end of the network.
Router(config)# hostname Costas

19. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A. MTA b. SMTP
A random delay helps prevent the stations from experiencing another collision during transmission.
Is used by the server to resolve names.
255.255.255.224

20. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
SMB
Network Media Control
The packets will be delivered and reassembled at destination.

21. What can be a problem that is reduced by adding end-to-end addressing?
Identify the device that allows local network computers to communicate w/ devices in other networks.
It reduces unnecessary broadcasts.
IP is not properly installed
A. hot keys b. context-sensitive c. command syntax check

22. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
No collisions will occur on this link.
The address of the router that the host will use to 'get to the other side'.
Rollover cable

23. 3 statements about routes and their use
A. servers b. routers c. network printers
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
Transport
2046

24. What kind of problems are caused by excessive broadcast traffic on network segments?
Logical Link Control sublayer
No collisions will occur on this link.
A random delay helps prevent the stations from experiencing another collision during transmission.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

25. What device can check for faults - integrity and performance of media?
A. non-deterministic b. less overhead c. collisions exist
Identify the device that allows local network computers to communicate w/ devices in other networks.
OTDR
As the commands are entered.

26. If you have a small network w/ 3 computers...
It provides interface between applications on either end of the network.
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
UTP
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

27. Which IP packet field will prevent endless loops?
It does not support encryption.
2046
Show Interfaces
Time-to-live (TTL)

28. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Network Layer
A. enable mode b. priviledge executive mode
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. flow control b. session establishment c. numbering and sequencing

29. 2 characteristics of peer-2-peer
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
Collisions can decrease network performance.
A. decentralized resources b. resource sharing w/o a dedicated server

30. During encapsulation - what happens in the Data Link Layer?
A. DB 60 b. Winchester 15-pin c. smart serial
A. it has centralized administration b. security is easier to enforce
The physical address is added.
It provides interface between applications on either end of the network.

31. 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. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. show startup-config b. show running-config
Network Media Control
A. larger address space b. data types and classes of service c. authentication and encryption

32. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
SMB
172.16.192.160
MAC
Hosts return to listen-before-transmit mode.

33. What do end devices do?
UDP
A. Physical b. Data Link
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Originate data flow.

34. What do the intermediary devices in the network do?
A physical topology.
UDP
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Router

35. What networking devices are recommended to be assigned static IP addresses?
255.255.255.0
UTP
A. servers b. routers c. network printers
It uses support from the lower layers to distinguish between connections to the service.

36. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. DB 60 b. Winchester 15-pin c. smart serial
A. Physical b. Data Link
A. next-hop b. metric/interface c. destination network address
A. it has centralized administration b. security is easier to enforce

37. Which 2 options represent Layer 4 addressing?
8
Transport
A. identifies the communicating applications b. identifies multiple conversations between the hosts
OTDR

38. 3 features that allow TCP to realibly and accurately track the transmission of data
A. flow control b. session establishment c. numbering and sequencing
A. show startup-config b. show running-config
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Twisting of the cables

39. What are 3 properties of contention-based media access for a shared media?
Router
Next-Hop Address
A. non-deterministic b. less overhead c. collisions exist
Fiber

40. What is the function of the DLL?
A. Cat5 UTP b. Cat6 UTP
It provides for the exchange of data over a common local media.
SSH
Router

41. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
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. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Ctrl + Shift + 6
0 to 1023

42. Why are port numbers included in the TCP header of a segment?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Window Size
To enable a receiving host to forward the data to the appropriate application.
A. performance degradation b. security issues c. host identification

43. 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
8
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
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

44. What is a protocol that provides connectionless network layer services?
IP Protocol
0 to 1023
Collisions can decrease network performance.
Identify the device that allows local network computers to communicate w/ devices in other networks.

45. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
80 (HTTP)
A. MTA b. SMTP
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
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

46. What makes fiber preferable to copper for interconnecting buildings?
A. HTTP b. HTTPS
Show Interfaces
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Is a layer of specific encapsulation.

47. Which combination of keys can be used to interrupt a ping or traceroute process?
Ctrl + Shift + 6
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. it has centralized administration b. security is easier to enforce
The physical address is added.

48. Group of hosts that have identical bit patterns in the high order bits of their addresses
SMB
Network Layer Packet
Network
A. netstat -r b. route PRINT

49. 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. minimizing of collisions b. division into broadcast domains
It uses lasers as the light source.
172.16.192.160
A. Cat5 UTP b. Cat6 UTP

50. What method of signal transmission uses radio waves to carry signals?
Wireless
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. media sharing b. logical topology
OTDR

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CCNA - 2

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