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CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. When is a straight-through cable used in a network?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Router(config)# hostname Costas
When connecting a host to a switch.
Hosts return to listen-before-transmit mode.

2. 2 functions of encapsulation
Physical
Network portion
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

3. What event occurs during the 3-way handshake?
TCP initializes the sequence numbers for the sessions.
A. larger address space b. data types and classes of service c. authentication and encryption
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
255.255.255.0

4. Important characteristic of UDP
Minimal delays in data delivery.
A. next-hop b. metric/interface c. destination network address
SMB
SSH

5. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. Physical b. Data Link
Collisions can decrease network performance.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

6. What are the advantages of using a client-server model?
A. it has centralized administration b. security is easier to enforce
Network Layer
It provides interface between applications on either end of the network.
A. goodput b. throughput c. bandwidth

7. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
The destination host address.
MAC
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. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

8. What are 3 properties of contention-based media access for a shared media?
A. non-deterministic b. less overhead c. collisions exist
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Ctrl + Shift + 6
A random delay helps prevent the stations from experiencing another collision during transmission.

9. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
A. servers b. routers c. network printers
Application Layer
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Network Layer Packet

10. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Destination Network Address
255.255.255.224
A. addressing b. error detection c. frame delimiting
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

11. Where is the IOS file stored at?
It uses support from the lower layers to distinguish between connections to the service.
Flash
OTDR
Host A

12. What is an automated service that matches resource names w/ required IP addresses?
The magnetic field around the adjacent pairs of wire.
Create signals that represent the bits in each frame for the media.
DNS
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

13. An admin needs to keep contents private - which access method should he use?
A. minimizing of collisions b. division into broadcast domains
SSH
Originate data flow.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

14. What are 2 commands used to view a host routing table?
A. goodput b. throughput c. bandwidth
2046
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. netstat -r b. route PRINT

15. 3 protocols that operate in the application layer
As the commands are entered.
Console interface
A. it has centralized administration b. security is easier to enforce
A. DNS b. SMTP c. POP

16. At which layers of the OSI model does ethernet operate?
Collisions can decrease network performance.
A. physical layer b. DLL layer
The MAC protocol can be very simple.
A. larger address space b. data types and classes of service c. authentication and encryption

17. What makes fiber preferable to copper for interconnecting buildings?
It has expanded adressing capabilities.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Identify the device that allows local network computers to communicate w/ devices in other networks.
Physical

18. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
Fiber
The address of the router that the host will use to 'get to the other side'.
Host mobility

19. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
They must wait until the first hosts finish transfering the media.
Is used by the server to resolve names.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
0 to 1023

20. In a connectionless system - What is correct?
Rollover cable
Destination is not contacted before a packet is sent.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
The destination host address.

21. What device can check for faults - integrity and performance of media?
A. decentralized resources b. resource sharing w/o a dedicated server
OTDR
It reduces unnecessary broadcasts.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

22. Which IP packet field will prevent endless loops?
A. goodput b. throughput c. bandwidth
IP is not properly installed
Time-to-live (TTL)
UDP

23. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Flash
A. larger address space b. data types and classes of service c. authentication and encryption

24. 3 primary functions of the data link layer encapsulation
A. physical layer b. DLL layer
A. addressing b. error detection c. frame delimiting
A. they initiate data exchanges b. they may upload data to servers
The magnetic field around the adjacent pairs of wire.

25. What is the primary reason for developing IPv6?
IP is not properly installed
It provides for the exchange of data over a common local 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
It has expanded adressing capabilities.

26. What is a characteristic of a single-mode fiber-optic cable?
Window Size
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Is a layer of specific encapsulation.
It uses lasers as the light source.

27. Default Gateway is incorrect on the host - What is the impact on the communications?
It does not support encryption.
A. HTTP b. HTTPS
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. flow control b. session establishment c. numbering and sequencing

28. 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
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. they initiate data exchanges b. they may upload data to servers
A. addressing b. error detection c. frame delimiting

29. What is the purpose of a default gateway?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Identify the device that allows local network computers to communicate w/ devices in other networks.
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.

30. 3 statements of media acess control
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
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
SMB
Next-Hop Address

31. What are 2 features of User Diagram Protocol (UDP)?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Logical Link Control sublayer
Supports error detection.
A. low overhead b. connectionless

32. After an ethernet collision - which device has priority to transmit data?
Any device whose backoff timer expires first.
A. copper UTP b. optical fiber
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Network Access

33. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
OTDR
Hub
Network address
FTP

34. What networking devices are recommended to be assigned static IP addresses?
A. servers b. routers c. network printers
It uses support from the lower layers to distinguish between connections to the service.
Supports error detection.
A physical topology.

35. What causes crosstalk within cable pairs when using UTP?
DNS
The magnetic field around the adjacent pairs of wire.
32 bits
A. hot keys b. context-sensitive c. command syntax check

36. What is the purpose of the preamble in an ethernet frame?
Logical Link Control sublayer
Create signals that represent the bits in each frame for the media.
UDP
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

37. What is a default gateway address?

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38. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
To facilitate the entry and exit of data on media.
Router(config)# interface FastEthernet 0/1
A default gateway (router).
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

39. When a network service fails - which port is most often used to access a router for management purposes?
A. next-hop b. metric/interface c. destination network address
A. servers b. routers c. network printers
A. larger address space b. data types and classes of service c. authentication and encryption
Console

40. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
Physical
0 to 1023
A. DB 60 b. Winchester 15-pin c. smart serial
UTP

41. Why are port numbers included in the TCP header of a segment?
It has expanded adressing capabilities.
To enable a receiving host to forward the data to the appropriate application.
A. Physical b. Data Link
A. low overhead b. connectionless

42. What is a benefit of a WAN?
To facilitate the entry and exit of data on media.
A. Physical b. Data Link
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Host mobility

43. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
255.255.255.0
A. router b. firewall
Supports error detection.

44. To make a console connection from a comp to a Cisco router - what cable should be used?
Network
A physical topology.
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
Rollover cable

45. What are 2 common characteristics associated w/ dynamic routing protocols?
A. media sharing b. logical topology
Rollover cable
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Signal loss can be experienced.

46. What 2 type of cables would most commonly be used for new runs?
A. Cat5 UTP b. Cat6 UTP
The destination host address.
A. enable mode b. priviledge executive mode
Any device whose backoff timer expires first.

47. 3 features that allow TCP to realibly and accurately track the transmission of data
Router
A. flow control b. session establishment c. numbering and sequencing
TCP initializes the sequence numbers for the sessions.
DNS

48. 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?
They must wait until the first hosts finish transfering the media.
Any device whose backoff timer expires first.
A default gateway (router).
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

49. What are 2 protocols for transfering web resources?
0 to 1023
A. application b. services
To facilitate the entry and exit of data on media.
A. HTTP b. HTTPS

50. What command is used to change the default name to 'Costas'?
A. copper UTP b. optical fiber
Router(config)# hostname Costas
A. performance degradation b. security issues c. host identification
A. it has centralized administration b. security is easier to enforce