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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. What is a characteristic of a logical point-to-point topology?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
When connecting a host to a switch.
A. perform degradation b. security issues c. host identification
The MAC protocol can be very simple.

2. 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?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
8
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
Switch

3. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. enable mode b. priviledge executive mode
SSH
8
A. show startup-config b. show running-config

4. What is dinamically selected by the source host when forwarding data?
Source Port
A. low overhead b. connectionless
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

5. What do end devices do?
They must wait until the first hosts finish transfering the media.
Originate data flow.
A backbone cable.
SMB

6. Network Protocols
Router(config)# interface FastEthernet 0/1
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Hub
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

7. 2 features that make switches preferable to hubs
Destination Network Address
Console interface
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. minimizing of collisions b. division into broadcast domains

8. After an ethernet collision - which device has priority to transmit data?
A. copper UTP b. optical fiber
Any device whose backoff timer expires first.
It reduces unnecessary broadcasts.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

9. 3 features that allow TCP to realibly and accurately track the transmission of data
Identify processes or services that are communicating with end devices.
A. MTA b. SMTP
Destination Network Address
A. flow control b. session establishment c. numbering and sequencing

10. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Static
Router
SMB
It does not support encryption.

11. What kind of problems are caused by excessive broadcast traffic on network segments?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. application b. services
The physical address is added.
Hosts return to listen-before-transmit mode.

12. 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
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. performance degradation b. security issues c. host identification
A. minimizing of collisions b. division into broadcast domains

13. Which 2 options represent Layer 4 addressing?
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
Logical Link Control sublayer
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. larger address space b. data types and classes of service c. authentication and encryption

14. 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 physical topology.
Host A
Console
255.255.255.224

15. What characteristic of an UTP helps reduce interference?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
The packets will be delivered and reassembled at destination.
Twisting of the cables
A. hot keys b. context-sensitive c. command syntax check

16. Statements that describe LAN
DNS
When connecting a host to a switch.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Twisting of the cables

17. 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
Originate data flow.
FTP
A physical topology.

18. What is the purpose of the TCP/IP Network Application Layer?
Identify processes or services that are communicating with end devices.
Network Media Control
Destination is not contacted before a packet is sent.
A. show startup-config b. show running-config

19. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Router
Switch
A. Cat5 UTP b. Cat6 UTP
A. media sharing b. logical topology

20. What is the purpose of a default gateway?
TCP initializes the sequence numbers for the sessions.
A. it has centralized administration b. security is easier to enforce
Identify the device that allows local network computers to communicate w/ devices in other networks.
Network Media Control

21. During encapsulation - what happens in the Data Link Layer?
Is a layer of specific encapsulation.
0 to 1023
The physical address is added.
Router(config)# hostname Costas

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

23. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
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)
Destination is not contacted before a packet is sent.
0 to 1023

24. Intermediary devices used to implement security between networks
A. servers b. routers c. network printers
32 bits
A. router b. firewall
A backbone cable.

25. What correctly describes a MAC address?
Time-to-live (TTL)
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
OTDR
A. identifies the communicating applications b. identifies multiple conversations between the hosts

26. 3 protocols that operate in the application layer
It does not support encryption.
A. router b. firewall
A. DNS b. SMTP c. POP
It reduces unnecessary broadcasts.

27. What causes crosstalk within cable pairs when using UTP?
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
The magnetic field around the adjacent pairs of wire.
Switch
Network Layer

28. There are too many broadcasts on switches - what can be done?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Router
A. replace a switch w/ a router b. subnet the new networks
Host mobility

29. What is an automated service that matches resource names w/ required IP addresses?
DNS
A. decentralized resources b. resource sharing w/o a dedicated server
Supports error detection.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

30. Where is the IOS file stored at?
Flash
UTP
A. addressing b. error detection c. frame delimiting
A. they initiate data exchanges b. they may upload data to servers

31. What can you identify when you examine the Network Layer header?
Signal loss can be experienced.
A. they initiate data exchanges b. they may upload data to servers
The destination host address.
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

32. 2 functions of encapsulation
Console
255.255.255.0
Any device whose backoff timer expires first.
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

33. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
A. copper UTP b. optical fiber
Physical
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. servers b. routers c. network printers

34. Which portion of the network layer address does a router use to forward packets?
Network portion
It uses support from the lower layers to distinguish between connections to the service.
Host A
Physical

35. When is a straight-through cable used in a network?
When connecting a host to a switch.
Network Media Control
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
The packets will be delivered and reassembled at destination.

36. What can get you to an outside network?
Hub
A default gateway (router).
The address of the router that the host will use to 'get to the other side'.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

37. What is the proper order of the OSI Layers?
32 bits
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A backbone cable.
Console

38. Group of hosts that have identical bit patterns in the high order bits of their addresses
SMB
A. addressing b. error detection c. frame delimiting
A. DNS b. SMTP c. POP
Network

39. What are 2 commands used to view a host routing table?
MAC
A. netstat -r b. route PRINT
It has expanded adressing capabilities.
Network address

40. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Is a layer of specific encapsulation.
Resolve IPv4 addresses to MAC addresses.
Window Size
A default gateway (router).

41. What is a protocol that provides connectionless network layer services?
A default gateway (router).
IP Protocol
Host mobility
Console interface

42. What information is added during encapsulation at OSI Layer 3?
A random delay helps prevent the stations from experiencing another collision during transmission.
UTP
Source and Destination IP address
SSH

43. 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?
A. show startup-config b. show running-config
255.255.255.224
A. servers b. routers c. network printers
8

44. 3 primary functions of the data link layer encapsulation
To prevent the receiver from being overwhelmed by incoming data.
A. addressing b. error detection c. frame delimiting
A. application b. presentation c. session d. transmision e. network f. data link g. physical
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

45. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
A. DNS b. SMTP c. POP
SMB
Network Layer Packet
A default gateway (router).

46. What command is used to change the default name to 'Costas'?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Twisting of the cables
Router(config)# hostname Costas

47. 3 characteristics of valid Ethernet Layer 2 addresses
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Source and Destination Ports
Hub
A. router b. firewall

48. What are key considering factors when grouping hosts into common networks?
It has expanded adressing capabilities.
A. purpose b. geographic location c. ownership
OTDR
A default gateway (router).

49. In business LANs - which connector is used w/ twisted-pair networking cable?
2046
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
RJ-45
A. next-hop b. metric/interface c. destination network address

50. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
IP Protocol
Physical
A. perform degradation b. security issues c. host identification
255.255.255.224