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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. 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?
The packets will be delivered and reassembled at destination.
Identify processes or services that are communicating with end devices.
It has expanded adressing capabilities.
They must wait until the first hosts finish transfering the media.

2. Statements that describe LAN
SMB
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Network Layer
A. flow control b. session establishment c. numbering and sequencing

3. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
Host mobility
It provides for the exchange of data over a common local media.
Router(config)# interface FastEthernet 0/1

4. Important characteristic of UDP
It provides for the exchange of data over a common local media.
Network Media Control
Minimal delays in data delivery.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

5. statements of IP adressing
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. 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
Source and Destination IP address
A. it has centralized administration b. security is easier to enforce

6. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. media sharing b. logical topology
IP is not properly installed
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Transport

7. Which device is used to create or divide broadcast domains?
Router
A. MTA b. SMTP
It uses support from the lower layers to distinguish between connections to the service.
A. next-hop b. metric/interface c. destination network address

8. When a device is moved from one network to the other...?
Router
Rollover cable
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
A backbone cable.

9. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
MAC
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
IP is not properly installed
Transport

10. What causes crosstalk within cable pairs when using UTP?
A. next-hop b. metric/interface c. destination network address
Router(config)# hostname Costas
The magnetic field around the adjacent pairs of wire.
Router(config)# interface FastEthernet 0/1

11. What are 2 commands used to view a host routing table?
0 to 1023
A. netstat -r b. route PRINT
Flash
They must wait until the first hosts finish transfering the media.

12. What is PDU?
The destination host address.
Is a layer of specific encapsulation.
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 random delay helps prevent the stations from experiencing another collision during transmission.

13. Why is flow control used for TCP data transfer?
Switch
Hub
To prevent the receiver from being overwhelmed by incoming data.
8

14. Default Gateway is incorrect on the host - What is the impact on the communications?
IP Protocol
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
The magnetic field around the adjacent pairs of wire.

15. What statements describe the logical token-passing topology?
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
Is a layer of specific encapsulation.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

16. What is a drawback of the CSMA/CD access method?
Source Port
A random delay helps prevent the stations from experiencing another collision during transmission.
Collisions can decrease network performance.
Switch

17. What is a component of a routing table entry?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Next-Hop Address
SMB
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

18. What is an effect of improperly applying a network cable connector?
It reduces unnecessary broadcasts.
Source and Destination IP address
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Signal loss can be experienced.

19. 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
A default gateway (router).
A. minimizing of collisions b. division into broadcast domains
It reduces unnecessary broadcasts.

20. What is the purpose of the preamble in an ethernet frame?
Rollover cable
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Network Layer
DNS

21. 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?
SSH
2046
32 bits
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

22. 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. addressing b. error detection c. frame delimiting
Destination is not contacted before a packet is sent.
8

23. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
32 bits
Supports error detection.
Hosts return to listen-before-transmit mode.
It uses support from the lower layers to distinguish between connections to the service.

24. What type of routing uses information that is manually entered into the routing table?
Static
Identify processes or services that are communicating with end devices.
Source and Destination Ports
Switch

25. Which 2 options represent Layer 4 addressing?
Host mobility
Is used by the server to resolve names.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Destination Network Address

26. 2 characteristics of peer-2-peer
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Network Layer
A. decentralized resources b. resource sharing w/o a dedicated server
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

27. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
Host A
A. physical layer b. DLL layer
Network Layer

28. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
SMB
Destination Network Address
It has expanded adressing capabilities.
A. enable mode b. priviledge executive mode

29. 3 measures of data transfer
Collisions can decrease network performance.
A. goodput b. throughput c. bandwidth
Host mobility
Rollover cable

30. What describes the purpose of default route?
Console interface
Destination Network Address
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Network Layer

31. What event occurs during the 3-way handshake?
Wireless
A. copper UTP b. optical fiber
Destination Network Address
TCP initializes the sequence numbers for the sessions.

32. 3 statements about the role of routers in the network
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Time-to-live (TTL)
Host mobility
It provides for the exchange of data over a common local media.

33. During a TCP session - if packets arrive out of order - what will happen?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Next-Hop Address
When connecting a host to a switch.
The packets will be delivered and reassembled at destination.

34. During encapsulation - what happens in the Data Link Layer?
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
Collisions can decrease network performance.
Wireless
The physical address is added.

35. What is a disadvantage of Telnet?
Switch
Binary ANDing
It does not support encryption.
Show Interfaces

36. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
OTDR
FTP
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

37. What is the primary purpose of ARP?
The magnetic field around the adjacent pairs of wire.
255.255.255.0
The physical address is added.
Resolve IPv4 addresses to MAC addresses.

38. What is the purpose of a default gateway?
RJ-45
0 to 1023
Physical
Identify the device that allows local network computers to communicate w/ devices in other networks.

39. What is an automated service that matches resource names w/ required IP addresses?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
It provides interface between applications on either end of the network.
A. MTA b. SMTP
DNS

40. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Transport
Flash
A. Physical b. Data Link

41. 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?
UTP
A. show startup-config b. show running-config
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
80 (HTTP)

42. In a connectionless system - What is correct?
A. decentralized resources b. resource sharing w/o a dedicated server
A. enable mode b. priviledge executive mode
Destination is not contacted before a packet is sent.
A. purpose b. geographic location c. ownership

43. What is the primary function of encapsulating packets into frames?
It provides interface between applications on either end of the network.
To facilitate the entry and exit of data on media.
80 (HTTP)
A. Physical b. Data Link

44. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
It uses lasers as the light source.
Collisions can decrease network performance.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Fiber

45. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
IP Protocol
A physical topology.
A. next-hop b. metric/interface c. destination network address

46. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
2046
A. addressing b. error detection c. frame delimiting
0 to 1023
UTP

47. 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. decentralized resources b. resource sharing w/o a dedicated server
Network address
172.16.192.160
Supports error detection.

48. If you have a small network w/ 3 computers...
Wireless
A. application b. services
To prevent the receiver from being overwhelmed by incoming data.
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

49. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A physical topology.
To prevent the receiver from being overwhelmed by incoming data.
32 bits
Router(config)# interface FastEthernet 0/1

50. At which layers of the OSI model does ethernet operate?
A. physical layer b. DLL layer
A. performance degradation b. security issues c. host identification
Router(config)# hostname Costas
Source Port

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CCNA - 2

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