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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 connectors are commonly associated w/ Cisco's V.35 serial cables?
It uses lasers as the light source.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. DB 60 b. Winchester 15-pin c. smart serial

2. What is a drawback of the CSMA/CD access method?
Collisions can decrease network performance.
Any device whose backoff timer expires first.
255.255.255.224
It provides interface between applications on either end of the network.

3. 3 statements about the role of routers in the network
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. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Network Layer
Network Media Control

4. What are 3 common problems w/ large networks?
To prevent the receiver from being overwhelmed by incoming data.
A. perform degradation b. security issues c. host identification
A. decentralized resources b. resource sharing w/o a dedicated server
A. low overhead b. connectionless

5. What information is added during encapsulation at OSI Layer 3?
The address of the router that the host will use to 'get to the other side'.
A. replace a switch w/ a router b. subnet the new networks
Show Interfaces
Source and Destination IP address

6. Network Protocols
A. larger address space b. data types and classes of service c. authentication and encryption
RJ-45
To enable a receiving host to forward the data to the appropriate application.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations

7. 2 things that will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Router(config)# hostname Costas
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Identify processes or services that are communicating with end devices.

8. There are too many broadcasts on switches - what can be done?
A. Cat5 UTP b. Cat6 UTP
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. HTTP b. HTTPS
A. replace a switch w/ a router b. subnet the new networks

9. Which IP packet field will prevent endless loops?
Console interface
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
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
Time-to-live (TTL)

10. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
To enable a receiving host to forward the data to the appropriate application.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Console interface
Window Size

11. What makes fiber preferable to copper for interconnecting buildings?
0 to 1023
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Destination Network Address
Wireless

12. What are 2 commands used to view a host routing table?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Hub
A. Physical b. Data Link
A. netstat -r b. route PRINT

13. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
A. flow control b. session establishment c. numbering and sequencing
A backbone cable.
Destination is not contacted before a packet is sent.

14. What type of network cable is used between a terminal and a console port?
Rollover cable
255.255.255.0
A. MTA b. SMTP
Binary ANDing

15. 3 functions of the upper data link sublayer in the OSI model
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. copper UTP b. optical fiber
A. decentralized resources b. resource sharing w/o a dedicated server
To enable a receiving host to forward the data to the appropriate application.

16. Which type of cable is most often associated w/ fiber-optic cable?
A. flow control b. session establishment c. numbering and sequencing
A backbone cable.
It does not support encryption.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

17. What are 2 common characteristics associated w/ dynamic routing protocols?
Router(config)# hostname Costas
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
It has expanded adressing capabilities.

18. What are 3 properties of contention-based media access for a shared media?
The address of the router that the host will use to 'get to the other side'.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. non-deterministic b. less overhead c. collisions exist
A. Cat5 UTP b. Cat6 UTP

19. What command is used to change the default name to 'Costas'?
Console interface
Router(config)# hostname Costas
32 bits
A. goodput b. throughput c. bandwidth

20. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. enable mode b. priviledge executive mode
A. flow control b. session establishment c. numbering and sequencing
32 bits

21. Which 2 options represent Layer 4 addressing?
To enable a receiving host to forward the data to the appropriate application.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Router(config)# interface FastEthernet 0/1

22. What is a characteristic of a single-mode fiber-optic cable?
Network portion
It uses lasers as the light source.
Network Layer Packet
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

23. 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?
It does not support encryption.
8
DNS
A. performance degradation b. security issues c. host identification

24. What info is found in the TCP and UDP header info?
The magnetic field around the adjacent pairs of wire.
255.255.255.224
A. netstat -r b. route PRINT
Source and Destination Ports

25. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Destination is not contacted before a packet is sent.
A. enable mode b. priviledge executive mode
Network Layer Packet
A. replace a switch w/ a router b. subnet the new networks

26. What is the primary purpose of Layer 4?
SSH
Identify processes or services that are communicating with end devices.
Create signals that represent the bits in each frame for the media.
It uses support from the lower layers to distinguish between connections to the service.

27. What is a benefit of a WAN?
Is used by the server to resolve names.
Host mobility
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. HTTP b. HTTPS

28. What is a characteristic of a logical point-to-point topology?
The magnetic field around the adjacent pairs of wire.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Network address
The MAC protocol can be very simple.

29. What can get you to an outside network?
A default gateway (router).
Binary ANDing
A. copper UTP b. optical fiber
A. application b. presentation c. session d. transmision e. network f. data link g. physical

30. What device can check for faults - integrity and performance of media?
Identify processes or services that are communicating with end devices.
The MAC protocol can be very simple.
OTDR
A. performance degradation b. security issues c. host identification

31. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Source Port
Host mobility
Fiber

32. What command can be used to determine if the router has experienced any input or output errors?
Source Port
Rollover cable
Show Interfaces
A. application b. presentation c. session d. transmision e. network f. data link g. physical

33. Intermediary devices used to implement security between networks
A. router b. firewall
Rollover cable
Static
A. show startup-config b. show running-config

34. Which characteristics describe fiber optic cable?
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. not affected by EMI of RFI b. most expensive type of LAN cabling
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
Network Layer Packet

35. What type of routing uses information that is manually entered into the routing table?
Host mobility
A. replace a switch w/ a router b. subnet the new networks
The packets will be delivered and reassembled at destination.
Static

36. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
A. application b. services
The address of the router that the host will use to 'get to the other side'.
Destination Network Address
Supports error detection.

37. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Hub
Network
It uses lasers as the light source.

38. 3 properties of peer-2-peer applications
No collisions will occur on this link.
The address of the router that the host will use to 'get to the other side'.
The MAC protocol can be very simple.
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

39. What is the role of MTA in handling email?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. copper UTP b. optical fiber
Router

40. In business LANs - which connector is used w/ twisted-pair networking cable?
The address of the router that the host will use to 'get to the other side'.
Switch
RJ-45
Console interface

41. What can be a problem that is reduced by adding end-to-end addressing?
It reduces unnecessary broadcasts.
DNS
Network Media Control
A. replace a switch w/ a router b. subnet the new networks

42. At which layers of the OSI model does ethernet operate?
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. physical layer b. DLL layer
A. performance degradation b. security issues c. host identification
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

43. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
To enable a receiving host to forward the data to the appropriate application.
A random delay helps prevent the stations from experiencing another collision during transmission.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

44. What is the purpose of the TCP/IP Network Application Layer?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Network Media Control
Wireless
A backbone cable.

45. 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. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. show startup-config b. show running-config
A. media sharing b. logical topology
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

46. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
No collisions will occur on this link.
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 default gateway (router).
Hosts return to listen-before-transmit mode.

47. What is an automated service that matches resource names w/ required IP addresses?
Destination is not contacted before a packet is sent.
Resolve IPv4 addresses to MAC addresses.
Console
DNS

48. What is the primary reason for developing IPv6?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Network
It has expanded adressing capabilities.
The physical address is added.

49. 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
Fiber
Next-Hop Address
A. physical layer b. DLL layer

50. What are 2 forms of application layer software?
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. application b. services
To prevent the receiver from being overwhelmed by incoming data.
A. they initiate data exchanges b. they may upload data to servers