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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 are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
Source and Destination Ports
A. goodput b. throughput c. bandwidth
A. application b. services

2. Which layer supplies services and allows user interface?
Application Layer
Flash
A random delay helps prevent the stations from experiencing another collision during transmission.
Window Size

3. What can get you to an outside network?
Destination Network Address
The MAC protocol can be very simple.
A default gateway (router).
To enable a receiving host to forward the data to the appropriate application.

4. If you have a small network w/ 3 computers...
A. DB 60 b. Winchester 15-pin c. smart serial
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
It provides for the exchange of data over a common local media.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

5. What can you identify when you examine the Network Layer header?
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 destination host address.
Host mobility
A. low overhead b. connectionless

6. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
0 to 1023
A. DB 60 b. Winchester 15-pin c. smart serial
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

7. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Router(config)# interface FastEthernet 0/1
To enable a receiving host to forward the data to the appropriate application.
Fiber

8. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
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
Destination Network Address
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. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

9. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
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.
A. show startup-config b. show running-config
UTP

10. What are 2 commands used to view a host routing table?
Rollover cable
Is used by the server to resolve names.
Destination is not contacted before a packet is sent.
A. netstat -r b. route PRINT

11. Which type of cable is most often associated w/ fiber-optic cable?
A backbone cable.
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
Rollover cable
Binary ANDing

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?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
2046
Signal loss can be experienced.
Source and Destination Ports

13. When a device is moved from one network to the other...?
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. the router will discard the packet b. the router will send a time exceeded message to the source host
Host A
It reduces unnecessary broadcasts.

14. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
TCP initializes the sequence numbers for the sessions.
Application Layer
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

15. What is the function of the DLL?
Hub
It provides for the exchange of data over a common local media.
172.16.192.160
A. HTTP b. HTTPS

16. What is a characteristic of a logical point-to-point topology?
Network
A. purpose b. geographic location c. ownership
To facilitate the entry and exit of data on media.
The MAC protocol can be very simple.

17. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
IP is not properly installed
0 to 1023
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Application Layer

18. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Is used by the server to resolve names.
DNS
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A random delay helps prevent the stations from experiencing another collision during transmission.

19. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
A. physical layer b. DLL layer
A. non-deterministic b. less overhead c. collisions exist
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
Router(config)# interface FastEthernet 0/1

20. What event occurs during the 3-way handshake?
Source and Destination IP address
TCP initializes the sequence numbers for the sessions.
Network Layer Packet
A. physical layer b. DLL layer

21. If host A's DG is 10.0.0.1 and host B's DG is 10.0.0.2 - when the router's IP address is 10.0.0.1. Which one will go through?
Host A
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
8

22. When is a straight-through cable used in a network?
The packets will be delivered and reassembled at destination.
A backbone cable.
When connecting a host to a switch.
Host A

23. What is the role of the OSI Application Layer?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
It provides interface between applications on either end of the network.
Rollover cable
Network Layer

24. What networking devices are recommended to be assigned static IP addresses?
A. non-deterministic b. less overhead c. collisions exist
Switch
A. servers b. routers c. network printers
FTP

25. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
SMB
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. larger address space b. data types and classes of service c. authentication and encryption

26. What is the primary purpose of ARP?
Resolve IPv4 addresses to MAC addresses.
It reduces unnecessary broadcasts.
OTDR
Ctrl + Shift + 6

27. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
2046
Wireless
Flash
Network Layer Packet

28. 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
Network Layer Packet
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Is a layer of specific encapsulation.

29. What type of network cable is used between a terminal and a console port?
IP Protocol
A. goodput b. throughput c. bandwidth
It does not support encryption.
Rollover cable

30. When destination network is not in the routing table - What are 2 actions the router might take?
Console
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
They must wait until the first hosts finish transfering the media.

31. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
The physical address is added.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. Physical b. Data Link

32. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
A. Cat5 UTP b. Cat6 UTP
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

33. What are the advantages of using a client-server model?
UDP
It uses lasers as the light source.
Host mobility
A. it has centralized administration b. security is easier to enforce

34. 3 common problems w/ a large network
Network Media Control
A. performance degradation b. security issues c. host identification
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

35. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
A. larger address space b. data types and classes of service c. authentication and encryption
Static
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

36. What is a protocol that provides connectionless network layer services?
A. DB 60 b. Winchester 15-pin c. smart serial
IP Protocol
DNS
UDP

37. 2 most commonly used media types in ethernet networks
Fiber
Rollover cable
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. copper UTP b. optical fiber

38. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
8
The MAC protocol can be very simple.

39. What is the proper order of the OSI Layers?
Identify processes or services that are communicating with end devices.
A. addressing b. error detection c. frame delimiting
Host mobility
A. application b. presentation c. session d. transmision e. network f. data link g. physical

40. What is a component of a routing table entry?
Next-Hop Address
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
The address of the router that the host will use to 'get to the other side'.
A. non-deterministic b. less overhead c. collisions exist

41. What characteristic of an UTP helps reduce interference?
Twisting of the cables
Collisions can decrease network performance.
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

42. 3 factors that should be considered when implementing Layer 2 protocols
IP Protocol
A. servers b. routers c. network printers
OTDR
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

43. What is the primary reason for developing IPv6?
A backbone cable.
It has expanded adressing capabilities.
It provides interface between applications on either end of the network.
A. media sharing b. logical topology

44. 2 features that make switches preferable to hubs
A. decentralized resources b. resource sharing w/o a dedicated server
A. minimizing of collisions b. division into broadcast domains
Wireless
IP Protocol

45. During a TCP session - if packets arrive out of order - what will happen?
Signal loss can be experienced.
A. performance degradation b. security issues c. host identification
A. purpose b. geographic location c. ownership
The packets will be delivered and reassembled at destination.

46. What statements describe the logical token-passing topology?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. goodput b. throughput c. bandwidth
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Switch

47. What are 2 email components used to forward mail between servers?
Minimal delays in data delivery.
Is a layer of specific encapsulation.
A. MTA b. SMTP
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

48. What command is used to change the default name to 'Costas'?
Source and Destination IP address
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Window Size
Router(config)# hostname Costas

49. What do you need to use for an initial configuration on a Cisco router?
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. decentralized resources b. resource sharing w/o a dedicated server
A. router b. firewall
Console interface

50. What causes crosstalk within cable pairs when using UTP?
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. DB 60 b. Winchester 15-pin c. smart serial
The magnetic field around the adjacent pairs of wire.
A default gateway (router).

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CCNA - 2

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