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CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Signal loss can be experienced.
Console
It has expanded adressing capabilities.
Network Layer Packet

2. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. enable mode b. priviledge executive mode
Is a layer of specific encapsulation.

3. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
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. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A default gateway (router).

4. 3 statements about the role of routers in the network
A. goodput b. throughput c. bandwidth
Physical
A. HTTP b. HTTPS
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

5. What is the purpose of a default gateway?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Router(config)# interface FastEthernet 0/1
To prevent the receiver from being overwhelmed by incoming data.
A. they initiate data exchanges b. they may upload data to servers

6. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Hosts return to listen-before-transmit mode.
Destination is not contacted before a packet is sent.
Network Layer Packet
Rollover cable

7. What is the primary function of encapsulating packets into frames?
Any device whose backoff timer expires first.
TCP initializes the sequence numbers for the sessions.
To facilitate the entry and exit of data on media.
Static

8. What kind of problems are caused by excessive broadcast traffic on network segments?
Hub
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Console interface
255.255.255.224

9. 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. purpose b. geographic location c. ownership
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Host mobility

10. What describes the purpose of default route?
Static
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. non-deterministic b. less overhead c. collisions exist
A. replace a switch w/ a router b. subnet the new networks

11. What 2 type of cables would most commonly be used for new runs?
When connecting a host to a switch.
Twisting of the cables
OTDR
A. Cat5 UTP b. Cat6 UTP

12. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. enable mode b. priviledge executive mode
UDP
MAC
A. copper UTP b. optical fiber

13. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
The magnetic field around the adjacent pairs of wire.
Router(config)# interface FastEthernet 0/1
Hub
Minimal delays in data delivery.

14. Which 2 options represent Layer 4 addressing?
A. decentralized resources b. resource sharing w/o a dedicated server
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. identifies the communicating applications b. identifies multiple conversations between the hosts
Signal loss can be experienced.

15. What are 2 commands used to view a host routing table?
A. flow control b. session establishment c. numbering and sequencing
A. netstat -r b. route PRINT
A. copper UTP b. optical fiber
A. minimizing of collisions b. division into broadcast domains

16. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Source Port
Binary ANDing
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

17. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. goodput b. throughput c. bandwidth
8

18. What is a component of a routing table entry?
Source and Destination Ports
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Next-Hop Address
A. addressing b. error detection c. frame delimiting

19. Which type of cable is most often associated w/ fiber-optic cable?
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
Rollover cable
Network Media Control
A backbone cable.

20. 3 properties of peer-2-peer applications
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Network Access
Network Layer
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

21. How many bits make up an IPv4 address?
It reduces unnecessary broadcasts.
32 bits
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

22. To make a console connection from a comp to a Cisco router - what cable should be used?
Rollover 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
A backbone cable.
UDP

23. What event occurs during the 3-way handshake?
A. servers b. routers c. network printers
A. it has centralized administration b. security is easier to enforce
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
TCP initializes the sequence numbers for the sessions.

24. What can you identify when you examine the Network Layer header?
Signal loss can be experienced.
It provides for the exchange of data over a common local media.
The destination host address.
A. hot keys b. context-sensitive c. command syntax check

25. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
255.255.255.0
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
It uses lasers as the light source.
A. the router will discard the packet b. the router will send a time exceeded message to the source host

26. What are 2 features of User Diagram Protocol (UDP)?
Network Access
A. low overhead b. connectionless
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
To enable a receiving host to forward the data to the appropriate application.

27. What is an effect of improperly applying a network cable connector?
A. DB 60 b. Winchester 15-pin c. smart serial
Signal loss can be experienced.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
As the commands are entered.

28. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
IP Protocol
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
The packets will be delivered and reassembled at destination.

29. What is the proper order of the OSI Layers?
A. show startup-config b. show running-config
The physical address is added.
172.16.192.160
A. application b. presentation c. session d. transmision e. network f. data link g. physical

30. 2 characteristics of peer-2-peer
A backbone cable.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. decentralized resources b. resource sharing w/o a dedicated server
A. Cat5 UTP b. Cat6 UTP

31. Which characteristics describe fiber optic cable?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
SMB
0 to 1023
Window Size

32. 2 most commonly used media types in ethernet networks
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
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. copper UTP b. optical fiber

33. 3 facts about the network portion of an IPv4 address
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
The MAC protocol can be very simple.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
UTP

34. What are 2 protocols for transfering web resources?
Twisting of the cables
A physical topology.
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
A. HTTP b. HTTPS

35. If you have a full-duplex operational network - what can happen?
A. servers b. routers c. network printers
It uses lasers as the light source.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
No collisions will occur on this link.

36. At which layer of the TCP/IP model does ethernet operate?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
2046
8
Network Access

37. There are too many broadcasts on switches - what can be done?
A. replace a switch w/ a router b. subnet the new networks
Create signals that represent the bits in each frame for the media.
Window Size
A. copper UTP b. optical fiber

38. What does the IEEE 802.2 standard represent in Ethernet technologies?
A. next-hop b. metric/interface c. destination network address
A. DNS b. SMTP c. POP
2046
Logical Link Control sublayer

39. Which layer supplies services and allows user interface?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Application Layer
Network
Identify the device that allows local network computers to communicate w/ devices in other networks.

40. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. HTTP b. HTTPS
A default gateway (router).
0 to 1023
Network Access

41. 2 functions of encapsulation
A. perform degradation b. security issues c. host identification
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. flow control b. session establishment c. numbering and sequencing
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

42. What connectors are commonly associated w/ Cisco's V.35 serial cables?
OTDR
A. DB 60 b. Winchester 15-pin c. smart serial
They must wait until the first hosts finish transfering the media.
UDP

43. How does the application layer on a server process multiple client requests for services?
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
It uses lasers as the light source.
It uses support from the lower layers to distinguish between connections to the service.
Resolve IPv4 addresses to MAC addresses.

44. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
A. HTTP b. HTTPS
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Transport

45. During encapsulation - what happens in the Data Link Layer?
The physical address is added.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

46. What are the advantages of using a client-server model?
UTP
They must wait until the first hosts finish transfering the media.
IP is not properly installed
A. it has centralized administration b. security is easier to enforce

47. What do the intermediary devices in the network do?
Next-Hop Address
Network
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. netstat -r b. route PRINT

48. When a network service fails - which port is most often used to access a router for management purposes?
FTP
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
Source and Destination Ports
Console

49. Which IP packet field will prevent endless loops?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Console
A. decentralized resources b. resource sharing w/o a dedicated server
Time-to-live (TTL)

50. What characteristic of an UTP helps reduce interference?
Twisting of the cables
Logical Link Control sublayer
A. performance degradation b. security issues c. host identification
Router

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CCNA - 2

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