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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. An admin needs to keep contents private - which access method should he use?
SSH
Network
A. perform degradation b. security issues c. host identification
Create signals that represent the bits in each frame for the media.

2. 2 most commonly used media types in ethernet networks
A. larger address space b. data types and classes of service c. authentication and encryption
A. copper UTP b. optical fiber
A. application b. services
Router(config)# interface FastEthernet 0/1

3. What is a disadvantage of Telnet?
Is a layer of specific encapsulation.
It reduces unnecessary broadcasts.
255.255.255.224
It does not support encryption.

4. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
255.255.255.0
IP Protocol
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

5. 3 protocols that operate in the application layer
A. DNS b. SMTP c. POP
Collisions can decrease network performance.
A backbone cable.
The packets will be delivered and reassembled at destination.

6. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
It has expanded adressing capabilities.
Signal loss can be experienced.
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

7. Which type of cable is most often associated w/ fiber-optic cable?
32 bits
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Network Layer Packet
A backbone cable.

8. What is a component of a routing table entry?
A. show startup-config b. show running-config
Next-Hop Address
A. Cat5 UTP b. Cat6 UTP
No collisions will occur on this link.

9. What do you need to use for an initial configuration on a Cisco router?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Console interface
A. non-deterministic b. less overhead c. collisions exist
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

10. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
To enable a receiving host to forward the data to the appropriate application.
To prevent the receiver from being overwhelmed by incoming data.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

11. Important characteristic of UDP
A. flow control b. session establishment c. numbering and sequencing
Minimal delays in data delivery.
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

12. What are 3 pieces of info about a route contained in a routing table?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Network portion
It reduces unnecessary broadcasts.
A. next-hop b. metric/interface c. destination network address

13. What is PDU?
Any device whose backoff timer expires first.
IP is not properly installed
Is a layer of specific encapsulation.
A. they initiate data exchanges b. they may upload data to servers

14. What event occurs during the 3-way handshake?
Wireless
Flash
FTP
TCP initializes the sequence numbers for the sessions.

15. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
A. larger address space b. data types and classes of service c. authentication and encryption
It reduces unnecessary broadcasts.
IP is not properly installed
Wireless

16. What are 2 protocols for transfering web resources?
A. decentralized resources b. resource sharing w/o a dedicated server
A. HTTP b. HTTPS
Twisting of the cables
To enable a receiving host to forward the data to the appropriate application.

17. Which IP packet field will prevent endless loops?
Time-to-live (TTL)
A. Cat5 UTP b. Cat6 UTP
A. application b. services
Console interface

18. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
A. larger address space b. data types and classes of service c. authentication and encryption
OTDR
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

19. 3 statements about the role of routers in the network
MAC
A. physical layer b. DLL layer
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. Cat5 UTP b. Cat6 UTP

20. What information is added during encapsulation at OSI Layer 3?
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
The address of the router that the host will use to 'get to the other side'.
Source and Destination IP address
255.255.255.224

21. What are 3 common problems w/ large networks?
Ctrl + Shift + 6
80 (HTTP)
A. performance degradation b. security issues c. host identification
A. perform degradation b. security issues c. host identification

22. Which combination of keys can be used to interrupt a ping or traceroute process?
Ctrl + Shift + 6
Application Layer
Signal loss can be experienced.
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

23. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
Signal loss can be experienced.
A. Physical b. Data Link
Network Layer Packet

24. During a TCP session - if packets arrive out of order - what will happen?
It uses support from the lower layers to distinguish between connections to the service.
Window Size
RJ-45
The packets will be delivered and reassembled at destination.

25. 2 functions of encapsulation
To facilitate the entry and exit of data on media.
Time-to-live (TTL)
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
Network portion

26. What are 2 email components used to forward mail between servers?
It provides interface between applications on either end of the network.
A. MTA b. SMTP
Rollover cable
Source and Destination Ports

27. statements of IP adressing
The physical address is added.
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
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
Physical

28. 3 statements about routes and their use
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
They must wait until the first hosts finish transfering the media.
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. identifies pieces of data as part of the same communication b. ensures the data pieces can be directed to the correct receiving end device

29. What kind of problems are caused by excessive broadcast traffic on network segments?
Resolve IPv4 addresses to MAC addresses.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Transport
A. HTTP b. HTTPS

30. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
To prevent the receiver from being overwhelmed by incoming data.
A. decentralized resources b. resource sharing w/o a dedicated server
UDP
Supports error detection.

31. What causes crosstalk within cable pairs when using UTP?
It reduces unnecessary broadcasts.
Transport
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
The magnetic field around the adjacent pairs of wire.

32. When destination network is not in the routing table - What are 2 actions the router might take?
Network
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
IP Protocol

33. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
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
Router(config)# interface FastEthernet 0/1

34. 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
As the commands are entered.
A. enable mode b. priviledge executive mode
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

35. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
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.

36. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
Next-Hop Address
A. netstat -r b. route PRINT
Any device whose backoff timer expires first.

37. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Rollover cable
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
To facilitate the entry and exit of data on media.
Network address

38. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
0 to 1023
A. minimizing of collisions b. division into broadcast domains
As the commands are entered.
Wireless

39. What command is used to change the default name to 'Costas'?
Collisions can decrease network performance.
Router(config)# hostname Costas
Minimal delays in data delivery.
Source Port

40. Statements that describe LAN
80 (HTTP)
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
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
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

41. What is the primary reason for developing IPv6?
A. low overhead b. connectionless
It has expanded adressing capabilities.
As the commands are entered.
A. hot keys b. context-sensitive c. command syntax check

42. Which layer supplies services and allows user interface?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. hot keys b. context-sensitive c. command syntax check
Any device whose backoff timer expires first.
Application Layer

43. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Flash
A random delay helps prevent the stations from experiencing another collision during transmission.
TCP initializes the sequence numbers for the sessions.
Hub

44. What statements describe the logical token-passing topology?
Window Size
A physical topology.
MAC
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

45. What are 3 properties of contention-based media access for a shared media?
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
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. non-deterministic b. less overhead c. collisions exist
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

46. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
0 to 1023
2046
Flash

47. What is the purpose of resource records in DNS?
Network Access
A. show startup-config b. show running-config
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Is used by the server to resolve names.

48. 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?
A. copper UTP b. optical fiber
Host A
To enable a receiving host to forward the data to the appropriate application.
Hub

49. If you have a full-duplex operational network - what can happen?
Network Layer Packet
No collisions will occur on this link.
A random delay helps prevent the stations from experiencing another collision during transmission.
Next-Hop Address

50. 3 functions of the upper data link sublayer in the OSI model
A. purpose b. geographic location c. ownership
To facilitate the entry and exit of data on media.
A. copper UTP b. optical fiber
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

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CCNA - 2

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