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. 3 terms that define the forms of help available within the Cisco IOS
Network
A. hot keys b. context-sensitive c. command syntax check
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. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

2. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
Supports error detection.
It provides for the exchange of data over a common local media.
Network Access
UTP

3. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
A. low overhead b. connectionless
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. netstat -r b. route PRINT

4. What method of signal transmission uses radio waves to carry signals?
The physical address is added.
It does not support encryption.
The packets will be delivered and reassembled at destination.
Wireless

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?
2046
A. decentralized resources b. resource sharing w/o a dedicated server
Hub
It does not support encryption.

6. 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. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
8
Signal loss can be experienced.
A. hot keys b. context-sensitive c. command syntax check

7. When a device is moved from one network to the other...?
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
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. show startup-config b. show running-config

8. 3 statements about routes and their use
A. MTA b. SMTP
Is used by the server to resolve names.
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
Create signals that represent the bits in each frame for the media.

9. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. minimizing of collisions b. division into broadcast domains
0 to 1023
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

10. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
A. low overhead b. connectionless
Network Layer Packet
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

11. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
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
255.255.255.0
Console
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

12. What is PDU?
Is a layer of specific encapsulation.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

13. What makes fiber preferable to copper for interconnecting buildings?
A backbone cable.
Network Layer
Hub
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

14. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
A. minimizing of collisions b. division into broadcast domains
Physical
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
80 (HTTP)

15. Statements that describe LAN
A. HTTP b. HTTPS
It does not support 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)
UTP

16. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Transport
Time-to-live (TTL)
Host A
IP is not properly installed

17. What correctly describes a MAC address?
A. MTA b. SMTP
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Time-to-live (TTL)
Signal loss can be experienced.

18. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
Network Layer
A. low overhead b. connectionless
Destination Network Address
Hosts return to listen-before-transmit mode.

19. What is the purpose of resource records in DNS?
Wireless
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
The packets will be delivered and reassembled at destination.
Is used by the server to resolve names.

20. 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?
Host A
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Show Interfaces
Window Size

21. What do you need to use for an initial configuration on a Cisco router?
Console interface
Source and Destination IP address
Create signals that represent the bits in each frame for the media.
Application Layer

22. What is a disadvantage of Telnet?
Binary ANDing
It does not support encryption.
A. hot keys b. context-sensitive c. command syntax check
A. addressing b. error detection c. frame delimiting

23. 2 features that make switches preferable to hubs
Wireless
A. minimizing of collisions b. division into broadcast domains
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
SMB

24. 3 common problems w/ a large network
A. perform degradation b. security issues c. host identification
A. performance degradation b. security issues c. host identification
Next-Hop Address
A. physical layer b. DLL layer

25. What are 2 forms of application layer software?
A. application b. services
Signal loss can be experienced.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
IP Protocol

26. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
The MAC protocol can be very simple.
SMB

27. During a TCP session - if packets arrive out of order - what will happen?
Flash
The packets will be delivered and reassembled at destination.
A. MTA b. SMTP
A. physical layer b. DLL layer

28. What event occurs during the 3-way handshake?
Network
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
TCP initializes the sequence numbers for the sessions.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

29. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
A. low overhead b. connectionless
Signal loss can be experienced.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

30. What is a characteristic of a logical point-to-point topology?
Fiber
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. low overhead b. connectionless

31. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
A. DNS b. SMTP c. POP
A. copper UTP b. optical fiber
8
UDP

32. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
A. next-hop b. metric/interface c. destination network address
Supports error detection.
A. Cat5 UTP b. Cat6 UTP

33. What are 3 common problems w/ large networks?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. perform degradation b. security issues c. host identification
A. they initiate data exchanges b. they may upload data to servers
Host A

34. What kind of problems are caused by excessive broadcast traffic on network segments?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
8
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

35. 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. purpose b. geographic location c. ownership
A random delay helps prevent the stations from experiencing another collision during transmission.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. larger address space b. data types and classes of service c. authentication and encryption

36. Which combination of keys can be used to interrupt a ping or traceroute process?
Ctrl + Shift + 6
When connecting a host to a switch.
A. media sharing b. logical topology
MAC

37. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
It uses lasers as the light source.
TCP initializes the sequence numbers for the sessions.
IP is not properly installed
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

38. What information is added during encapsulation at OSI Layer 3?
Source and Destination IP address
The destination host address.
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Transport

39. Where is the IOS file stored at?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. show startup-config b. show running-config
TCP initializes the sequence numbers for the sessions.
Flash

40. What are 3 pieces of info about a route contained in a routing table?
SSH
A. next-hop b. metric/interface c. destination network address
Switch
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

41. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
It uses support from the lower layers to distinguish between connections to the service.
A. flow control b. session establishment c. numbering and sequencing
The address of the router that the host will use to 'get to the other side'.

42. What is a characteristic of a single-mode fiber-optic cable?
Identify processes or services that are communicating with end devices.
It uses lasers as the light source.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. enable mode b. priviledge executive mode

43. 3 characteristics of valid Ethernet Layer 2 addresses
A. replace a switch w/ a router b. subnet the new networks
Signal loss can be experienced.
8
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

44. What can get you to an outside network?
A default gateway (router).
No collisions will occur on this link.
A. flow control b. session establishment c. numbering and sequencing
Physical

45. After an ethernet collision - which device has priority to transmit data?
Network Layer
Show Interfaces
Any device whose backoff timer expires first.
Wireless

46. What is the purpose of the TCP/IP Network Application Layer?
Console interface
Network Media Control
Destination Network Address
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

47. During encapsulation - what happens in the Data Link Layer?
The physical address is added.
Network portion
A. perform degradation b. security issues c. host identification
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

48. At which layers of the OSI model does ethernet operate?
A. physical layer b. DLL layer
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
DNS
OTDR

49. What is the primary rope of the physical layer in transmitting data?
Create signals that represent the bits in each frame for the media.
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
IP Protocol
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

50. What characteristic of an UTP helps reduce interference?
Twisting of the cables
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
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. physical layer b. DLL layer