Test your basic knowledge |

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. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
The magnetic field around the adjacent pairs of wire.
Next-Hop Address
Time-to-live (TTL)
Fiber

2. What makes fiber preferable to copper for interconnecting buildings?
A backbone cable.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. performance degradation b. security issues c. host identification
Any device whose backoff timer expires first.

3. 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. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Network address
8
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

4. When do changes take effect in a Cisco router?
As the commands are entered.
Flash
A backbone cable.
Fiber

5. How many host addresses can be assigned to a subnetwork when using the 130.68.0.0 network address w/ a subnet mask of 255.255.248.0?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
IP Protocol
2046
A. it has centralized administration b. security is easier to enforce

6. Which IP packet field will prevent endless loops?
Time-to-live (TTL)
Network Media Control
Application Layer
Wireless

7. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Window Size
DNS
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

8. What is a characteristic of a logical point-to-point topology?
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. non-deterministic b. less overhead c. collisions exist
The MAC protocol can be very simple.
Destination Network Address

9. What is a protocol that provides connectionless network layer services?
Is used by the server to resolve names.
A. flow control b. session establishment c. numbering and sequencing
A. netstat -r b. route PRINT
IP Protocol

10. What are 3 properties of contention-based media access for a shared media?
A. non-deterministic b. less overhead c. collisions exist
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
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Hosts return to listen-before-transmit mode.

11. What is a component of a routing table entry?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
The address of the router that the host will use to 'get to the other side'.
A. DB 60 b. Winchester 15-pin c. smart serial
Next-Hop Address

12. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. application b. services
A. servers b. routers c. network printers
Network address

13. Which characteristics describe fiber optic cable?
A. enable mode b. priviledge executive mode
It provides for the exchange of data over a common local media.
A. DB 60 b. Winchester 15-pin c. smart serial
A. not affected by EMI of RFI b. most expensive type of LAN cabling

14. When destination network is not in the routing table - What are 2 actions the router might take?
Network Access
A. next-hop b. metric/interface c. destination network address
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. it has centralized administration b. security is easier to enforce

15. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
RJ-45
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
Resolve IPv4 addresses to MAC addresses.

16. Statements that describe LAN
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. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
2046
Application Layer

17. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
172.16.192.160
A. purpose b. geographic location c. ownership
A physical topology.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

18. 3 statements about routes and their use
A physical topology.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
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

19. What are 3 common problems w/ large networks?
A. perform degradation b. security issues c. host identification
A. netstat -r b. route PRINT
Hosts return to listen-before-transmit mode.
A. it has centralized administration b. security is easier to enforce

20. In business LANs - which connector is used w/ twisted-pair networking cable?
RJ-45
It reduces unnecessary broadcasts.
A. purpose b. geographic location c. ownership
Supports error detection.

21. What is a drawback of the CSMA/CD access method?
Originate data flow.
The magnetic field around the adjacent pairs of wire.
Collisions can decrease network performance.
It uses lasers as the light source.

22. What are 2 commands used to view a host routing table?
A. addressing b. error detection c. frame delimiting
A. netstat -r b. route PRINT
A. MTA b. SMTP
Console

23. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
A physical topology.
32 bits
Destination Network Address

24. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
Twisting of the cables
SSH
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

25. What is a disadvantage of Telnet?
It does not support encryption.
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. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. Cat5 UTP b. Cat6 UTP

26. 3 measures of data transfer
A. media sharing b. logical topology
8
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. goodput b. throughput c. bandwidth

27. What information is added during encapsulation at OSI Layer 3?
A. larger address space b. data types and classes of service c. authentication and encryption
UDP
The packets will be delivered and reassembled at destination.
Source and Destination IP address

28. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A random delay helps prevent the stations from experiencing another collision during transmission.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. low overhead b. connectionless
A. perform degradation b. security issues c. host identification

29. How many bits make up an IPv4 address?
32 bits
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
It does not support encryption.
A. they initiate data exchanges b. they may upload data to servers

30. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Hosts return to listen-before-transmit mode.
To enable a receiving host to forward the data to the appropriate application.
A. low overhead b. connectionless

31. What command can be used to determine if the router has experienced any input or output errors?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Show Interfaces
It uses support from the lower layers to distinguish between connections to the service.

32. What command is used to change the default name to 'Costas'?
To prevent the receiver from being overwhelmed by incoming data.
The destination host address.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Router(config)# hostname Costas

33. What is the purpose of the TCP/IP Network Application Layer?
A. netstat -r b. route PRINT
Network Media Control
Next-Hop Address
Network Layer Packet

34. What 2 type of cables would most commonly be used for new runs?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. Cat5 UTP b. Cat6 UTP
Resolve IPv4 addresses to MAC addresses.
FTP

35. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
Network Layer
UDP
Originate data flow.
It provides interface between applications on either end of the network.

36. What characteristic of an UTP helps reduce interference?
A. media sharing b. logical topology
Source Port
Twisting of the cables
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

37. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. non-deterministic b. less overhead c. collisions exist
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Destination Network Address
Network Layer

38. To make a console connection from a comp to a Cisco router - what cable should be used?
It provides interface between applications on either end of the network.
255.255.255.224
To prevent the receiver from being overwhelmed by incoming data.
Rollover cable

39. 3 statements about the role of routers in the network
A. minimizing of collisions b. division into broadcast domains
A. low overhead b. connectionless
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
UTP

40. 2 most commonly used media types in ethernet networks
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Host mobility
A. copper UTP b. optical fiber
Collisions can decrease network performance.

41. What type of routing uses information that is manually entered into the routing table?
A. purpose b. geographic location c. ownership
No collisions will occur on this link.
Static
80 (HTTP)

42. What is the purpose of resource records in DNS?
Is used by the server to resolve names.
Originate data flow.
8
Destination Network Address

43. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. non-deterministic b. less overhead c. collisions exist
TCP initializes the sequence numbers for the sessions.
A. Physical b. Data Link
Minimal delays in data delivery.

44. 3 primary functions of the data link layer encapsulation
A. performance degradation b. security issues c. host identification
A. addressing b. error detection c. frame delimiting
IP Protocol
Router

45. What is dinamically selected by the source host when forwarding data?
IP Protocol
OTDR
Source Port
32 bits

46. What layer encapsulates segments into packets?
A. enable mode b. priviledge executive mode
Router(config)# hostname Costas
Network Layer
A. goodput b. throughput c. bandwidth

47. 3 terms that define the forms of help available within the Cisco IOS
OTDR
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. hot keys b. context-sensitive c. command syntax check
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

48. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. goodput b. throughput c. bandwidth
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Hub

49. 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. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A. the router will discard the packet b. the router will send a time exceeded message to the source host
The destination host address.
A. router b. firewall

50. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
A physical topology.
It reduces unnecessary broadcasts.
Network