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CCNA - 2

Instructions:

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. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Is a layer of specific encapsulation.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
2046
Router(config)# interface FastEthernet 0/1

2. What is an effect of improperly applying a network cable connector?
When connecting a host to a switch.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
UTP
Signal loss can be experienced.

3. What makes fiber preferable to copper for interconnecting buildings?
Signal loss can be experienced.
32 bits
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. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

4. What do the intermediary devices in the network do?
A. application b. services
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
It provides interface between applications on either end of the network.
Network portion

5. 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?
A. flow control b. session establishment c. numbering and sequencing
SSH
Twisting of the cables
8

6. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
When connecting a host to a switch.
As the commands are entered.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

7. When destination network is not in the routing table - What are 2 actions the router might take?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. next-hop b. metric/interface c. destination network address
A. they initiate data exchanges b. they may upload data to servers
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

8. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Host mobility
SSH
Time-to-live (TTL)

9. What information is added during encapsulation at OSI Layer 3?
A. purpose b. geographic location c. ownership
Source and Destination IP address
A. next-hop b. metric/interface c. destination network address
A. non-deterministic b. less overhead c. collisions exist

10. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
A. minimizing of collisions b. division into broadcast domains
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
80 (HTTP)
Host A

11. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
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
Hub
The address of the router that the host will use to 'get to the other side'.
A default gateway (router).

12. There are too many broadcasts on switches - what can be done?
Application Layer
Is a layer of specific encapsulation.
They must wait until the first hosts finish transfering the media.
A. replace a switch w/ a router b. subnet the new networks

13. What characteristic of an UTP helps reduce interference?
Twisting of the cables
Show Interfaces
A. low overhead b. connectionless
FTP

14. Why are port numbers included in the TCP header of a segment?
Network Layer
A. DB 60 b. Winchester 15-pin c. smart serial
A. Cat5 UTP b. Cat6 UTP
To enable a receiving host to forward the data to the appropriate application.

15. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. minimizing of collisions b. division into broadcast domains
Collisions can decrease network performance.
A. servers b. routers c. network printers
Destination Network Address

16. 3 facts about the network portion of an IPv4 address
Fiber
A. router b. firewall
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Flash

17. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
Flash
Binary ANDing
A. non-deterministic b. less overhead c. collisions exist

18. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Window Size
A. larger address space b. data types and classes of service c. authentication and encryption
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

19. At which layers of the OSI model does ethernet operate?
Ctrl + Shift + 6
A. physical layer b. DLL layer
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
Network Access

20. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
A. addressing b. error detection c. frame delimiting
It uses lasers as the light source.
A. application b. services
255.255.255.0

21. Which layer supplies services and allows user interface?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
MAC
Application Layer

22. What type of network cable is used between a terminal and a console port?
UDP
Resolve IPv4 addresses to MAC addresses.
FTP
Rollover cable

23. Which type of cable is most often associated w/ fiber-optic cable?
A. they initiate data exchanges b. they may upload data to servers
A. replace a switch w/ a router b. subnet the new networks
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A backbone cable.

24. Which combination of keys can be used to interrupt a ping or traceroute process?
A. DB 60 b. Winchester 15-pin c. smart serial
Ctrl + Shift + 6
Is a layer of specific encapsulation.
A. router b. firewall

25. Intermediary devices used to implement security between networks
A. goodput b. throughput c. bandwidth
A. next-hop b. metric/interface c. destination network address
Host A
A. router b. firewall

26. What is the primary purpose of Layer 4?
Switch
Identify processes or services that are communicating with end devices.
Is a layer of specific encapsulation.
A random delay helps prevent the stations from experiencing another collision during transmission.

27. What is the function of the DLL?
It provides for the exchange of data over a common local media.
A. decentralized resources b. resource sharing w/o a dedicated server
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

28. 3 terms that define the forms of help available within the Cisco IOS
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Twisting of the cables
A. hot keys b. context-sensitive c. command syntax check
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

29. What are 3 common problems w/ large networks?
A. they initiate data exchanges b. they may upload data to servers
A. perform degradation b. security issues c. host identification
A. Cat5 UTP b. Cat6 UTP
Identify processes or services that are communicating with end devices.

30. If you have a small network w/ 3 computers...
Source and Destination IP address
A. goodput b. throughput c. bandwidth
Console
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

31. What determines the method of media access control?
A. media sharing b. logical topology
Flash
Rollover cable
Resolve IPv4 addresses to MAC addresses.

32. 2 characteristics of peer-2-peer
Destination Network Address
Network Layer
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. decentralized resources b. resource sharing w/o a dedicated server

33. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Show Interfaces
They must wait until the first hosts finish transfering the media.
0 to 1023
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

34. Which IP packet field will prevent endless loops?
A. show startup-config b. show running-config
Router(config)# interface FastEthernet 0/1
Time-to-live (TTL)
Source Port

35. 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. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. show startup-config b. show running-config
A. goodput b. throughput c. bandwidth

36. 3 statements of media acess control
They must wait until the first hosts finish transfering 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
A physical topology.
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

37. What type of routing uses information that is manually entered into the routing table?
Signal loss can be experienced.
Router(config)# hostname Costas
A. perform degradation b. security issues c. host identification
Static

38. What is the primary purpose of ARP?
Router(config)# hostname Costas
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. hot keys b. context-sensitive c. command syntax check
Resolve IPv4 addresses to MAC addresses.

39. What 2 type of cables would most commonly be used for new runs?
It has expanded adressing capabilities.
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
As the commands are entered.
A. Cat5 UTP b. Cat6 UTP

40. What is an automated service that matches resource names w/ required IP addresses?
DNS
A. HTTP b. HTTPS
Signal loss can be experienced.
Collisions can decrease network performance.

41. 3 functions of the upper data link sublayer in the OSI model
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. show startup-config b. show running-config
A. they initiate data exchanges b. they may upload data to servers
To prevent the receiver from being overwhelmed by incoming data.

42. What describes the purpose of default route?
A physical topology.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
The MAC protocol can be very simple.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

43. What command is used to change the default name to 'Costas'?
Network Layer Packet
Router(config)# hostname Costas
Binary ANDing
A random delay helps prevent the stations from experiencing another collision during transmission.

44. When a network service fails - which port is most often used to access a router for management purposes?
Console
SMB
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. next-hop b. metric/interface c. destination network address

45. Where is the IOS file stored at?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Window Size
Network portion
Flash

46. What is a characteristic of a single-mode fiber-optic cable?
Network Layer
As the commands are entered.
It uses lasers as the light source.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

47. What are 3 properties of contention-based media access for a shared media?
A. media sharing b. logical topology
A. non-deterministic b. less overhead c. collisions exist
Binary ANDing
A. flow control b. session establishment c. numbering and sequencing

48. Which 2 options represent Layer 4 addressing?
They must wait until the first hosts finish transfering the media.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Show Interfaces
Source and Destination Ports

49. 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
It provides interface between applications on either end of the network.
The address of the router that the host will use to 'get to the other side'.
FTP

50. What statements describe the logical token-passing topology?
They must wait until the first hosts finish transfering the media.
A. DNS b. SMTP c. POP
The destination host address.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

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CCNA - 2

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