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CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
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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 protocols that operate in the application layer
Hub
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. DNS b. SMTP c. POP
A. servers b. routers c. network printers

2. 2 most commonly used media types in ethernet networks
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. copper UTP b. optical fiber
The address of the router that the host will use to 'get to the other side'.

3. 3 facts about the network portion of an IPv4 address
Console interface
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Network Layer Packet

4. When do changes take effect in a Cisco router?
Is used by the server to resolve names.
Router
As the commands are entered.
They must wait until the first hosts finish transfering the media.

5. How many bits make up an IPv4 address?
32 bits
Network Layer Packet
Signal loss can be experienced.
Network Access

6. What method of signal transmission uses radio waves to carry signals?
The destination host address.
Wireless
A. decentralized resources b. resource sharing w/o a dedicated server
Network Layer

7. What command can be used to determine if the router has experienced any input or output errors?
172.16.192.160
Show Interfaces
Network address
No collisions will occur on this link.

8. What is the primary rope of the physical layer in transmitting data?
To prevent the receiver from being overwhelmed by incoming data.
Any device whose backoff timer expires first.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Create signals that represent the bits in each frame for the media.

9. What statements describe the logical token-passing topology?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Application Layer
Router(config)# hostname Costas
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

10. 3 primary functions of the data link layer encapsulation
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
OTDR
A. addressing b. error detection c. frame delimiting
A. hot keys b. context-sensitive c. command syntax check

11. What makes fiber preferable to copper for interconnecting buildings?
Network
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
The address of the router that the host will use to 'get to the other side'.

12. What is the primary reason for developing IPv6?
A. perform degradation b. security issues c. host identification
A default gateway (router).
It has expanded adressing capabilities.
FTP

13. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
Network Media Control
Source and Destination Ports
Wireless

14. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Network Media Control
A. servers b. routers c. network printers
255.255.255.0

15. What is a characteristic of a single-mode fiber-optic cable?
Twisting of the cables
A. addressing b. error detection c. frame delimiting
It uses lasers as the light source.
Create signals that represent the bits in each frame for the media.

16. In business LANs - which connector is used w/ twisted-pair networking cable?
A. performance degradation b. security issues c. host identification
RJ-45
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. netstat -r b. route PRINT

17. 3 functions of the upper data link sublayer in the OSI model
Fiber
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. DB 60 b. Winchester 15-pin c. smart serial
No collisions will occur on this link.

18. What is the purpose of resource records in DNS?
Network Access
Console
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Is used by the server to resolve names.

19. What is the primary purpose of Layer 4?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Identify processes or services that are communicating with end devices.
A. purpose b. geographic location c. ownership
A. servers b. routers c. network printers

20. What are 3 properties of contention-based media access for a shared media?
A. minimizing of collisions b. division into broadcast domains
A. flow control b. session establishment c. numbering and sequencing
A. non-deterministic b. less overhead c. collisions exist
A default gateway (router).

21. What is a benefit of a WAN?
Host mobility
A. low overhead b. connectionless
Physical
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

22. At which layer of the TCP/IP model does ethernet operate?
Network Access
A. minimizing of collisions b. division into broadcast domains
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Console

23. What is the function of the DLL?
Originate data flow.
It provides for the exchange of data over a common local media.
Is used by the server to resolve names.
A. flow control b. session establishment c. numbering and sequencing

24. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
Identify the device that allows local network computers to communicate w/ devices in other networks.
To prevent the receiver from being overwhelmed by incoming data.
A. MTA b. SMTP

25. Which IP packet field will prevent endless loops?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Transport
Resolve IPv4 addresses to MAC addresses.
Time-to-live (TTL)

26. What is the proper order of the OSI Layers?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Ctrl + Shift + 6
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. non-deterministic b. less overhead c. collisions exist

27. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
Router(config)# hostname Costas
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
SSH
MAC

28. What are 2 commands used to view a host routing table?
A. Physical b. Data Link
A. netstat -r b. route PRINT
172.16.192.160
Show Interfaces

29. What event occurs during the 3-way handshake?
A. next-hop b. metric/interface c. destination network address
A. flow control b. session establishment c. numbering and sequencing
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
TCP initializes the sequence numbers for the sessions.

30. What are 3 pieces of info about a route contained in a routing table?
Signal loss can be experienced.
A. next-hop b. metric/interface c. destination network address
Hub
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

31. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. servers b. routers c. network printers
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
A. DB 60 b. Winchester 15-pin c. smart serial

32. Network Protocols
The MAC protocol can be very simple.
Application Layer
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
It does not support encryption.

33. What are 2 protocols for transfering web resources?
When connecting a host to a switch.
A. next-hop b. metric/interface c. destination network address
A. HTTP b. HTTPS
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

34. What is the primary purpose of ARP?
Host A
Router
A. low overhead b. connectionless
Resolve IPv4 addresses to MAC addresses.

35. If you have a full-duplex operational network - what can happen?
Binary ANDing
No collisions will occur on this link.
Rollover cable
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

36. What correctly describes a MAC address?
Collisions can decrease network performance.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

37. What are 2 forms of application layer software?
A. application b. services
Show Interfaces
172.16.192.160
Flash

38. What is a characteristic of a logical point-to-point topology?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
When connecting a host to a switch.
A. router b. firewall
The MAC protocol can be very simple.

39. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Physical
Any device whose backoff timer expires first.
A backbone cable.
It uses support from the lower layers to distinguish between connections to the service.

40. What 2 type of cables would most commonly be used for new runs?
A. Cat5 UTP b. Cat6 UTP
255.255.255.0
Hub
A. DB 60 b. Winchester 15-pin c. smart serial

41. 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. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. perform degradation b. security issues c. host identification
A. MTA b. SMTP

42. 3 characteristics of valid Ethernet Layer 2 addresses
Source and Destination Ports
It uses lasers as the light source.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

43. Which portion of the network layer address does a router use to forward packets?
Is used by the server to resolve names.
Router(config)# interface FastEthernet 0/1
Switch
Network portion

44. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
A random delay helps prevent the stations from experiencing another collision during transmission.
Supports error detection.
Transport
Create signals that represent the bits in each frame for the media.

45. 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
OTDR
Identify the device that allows local network computers to communicate w/ devices in other networks.
Logical Link Control sublayer

46. Why are port numbers included in the TCP header of a segment?
To enable a receiving host to forward the data to the appropriate application.
Rollover cable
Source and Destination Ports
It provides for the exchange of data over a common local media.

47. What is the purpose of a default gateway?
A. MTA b. SMTP
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. hot keys b. context-sensitive c. command syntax check
Create signals that represent the bits in each frame for the media.

48. Statements that describe LAN
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Is a layer of specific encapsulation.
32 bits
Physical

49. What is a protocol that provides connectionless network layer services?
A. physical layer b. DLL layer
IP Protocol
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
The physical address is added.

50. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
A. replace a switch w/ a router b. subnet the new networks
Network address
Next-Hop Address
DNS

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CCNA - 2

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