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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. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. enable mode b. priviledge executive mode
A. show startup-config b. show running-config
Binary ANDing

2. What is the role of MTA in handling email?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A random delay helps prevent the stations from experiencing another collision during transmission.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
UTP

3. 3 characteristics of valid Ethernet Layer 2 addresses
A. application b. services
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
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

4. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
0 to 1023
To prevent the receiver from being overwhelmed by incoming data.
Fiber

5. What can you identify when you examine the Network Layer header?
The destination host address.
Network Layer
UTP
A physical topology.

6. When do changes take effect in a Cisco router?
A. Cat5 UTP b. Cat6 UTP
Network Layer Packet
As the commands are entered.
A. netstat -r b. route PRINT

7. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Console interface
Flash
SMB
A. the router will discard the packet b. the router will send a time exceeded message to the source host

8. 3 primary functions of the data link layer encapsulation
A. addressing b. error detection c. frame delimiting
Host A
SMB
A. it has centralized administration b. security is easier to enforce

9. In a connectionless system - What is correct?
Static
Destination is not contacted before a packet is sent.
Network
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

10. 3 features that allow TCP to realibly and accurately track the transmission of data
IP Protocol
As the commands are entered.
Identify processes or services that are communicating with end devices.
A. flow control b. session establishment c. numbering and sequencing

11. 3 functions of the upper data link sublayer in the OSI model
32 bits
Create signals that represent the bits in each frame for the media.
Network Access
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

12. Why are port numbers included in the TCP header of a segment?
8
FTP
To enable a receiving host to forward the data to the appropriate application.
A. copper UTP b. optical fiber

13. During encapsulation - what happens in the Data Link Layer?
Identify processes or services that are communicating with end devices.
Router
The physical address is added.
A. Cat5 UTP b. Cat6 UTP

14. What can be a problem that is reduced by adding end-to-end addressing?
A. Physical b. Data Link
It reduces unnecessary broadcasts.
It provides for the exchange of data over a common local media.
It does not support encryption.

15. What is the purpose of resource records in DNS?
Is used by the server to resolve names.
Console
Next-Hop Address
To prevent the receiver from being overwhelmed by incoming data.

16. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
DNS
Flash
A physical topology.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

17. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Rollover cable
A. next-hop b. metric/interface c. destination network address

18. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
A. copper UTP b. optical fiber
Router(config)# interface FastEthernet 0/1
Signal loss can be experienced.
UTP

19. Group of hosts that have identical bit patterns in the high order bits of their addresses
Network Access
The destination host address.
Network
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

20. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
No collisions will occur on this link.
It does not support encryption.
A. the router will discard the packet b. the router will send a time exceeded message to the source host

21. What is a drawback of the CSMA/CD access method?
Collisions can decrease network performance.
It reduces unnecessary broadcasts.
A default gateway (router).
Network

22. What causes crosstalk within cable pairs when using UTP?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
The magnetic field around the adjacent pairs of wire.
UDP
Physical

23. What are 2 features of User Diagram Protocol (UDP)?
A random delay helps prevent the stations from experiencing another collision during transmission.
A. low overhead b. connectionless
Router
A. purpose b. geographic location c. ownership

24. What command can be used to determine if the router has experienced any input or output errors?
Logical Link Control sublayer
Show Interfaces
It uses support from the lower layers to distinguish between connections to the service.
A. router b. firewall

25. In business LANs - which connector is used w/ twisted-pair networking cable?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
No collisions will occur on this link.
RJ-45
Create signals that represent the bits in each frame for the media.

26. What kind of problems are caused by excessive broadcast traffic on network segments?
A. HTTP b. HTTPS
Hosts return to listen-before-transmit mode.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Console

27. Which device is used to create or divide broadcast domains?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A physical topology.
Router
Supports error detection.

28. What is a protocol that provides connectionless network layer services?
255.255.255.0
IP Protocol
Originate data flow.
A default gateway (router).

29. 3 measures of data transfer
It reduces unnecessary broadcasts.
A. goodput b. throughput c. bandwidth
Next-Hop Address
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

30. When destination network is not in the routing table - What are 2 actions the router might take?
Switch
Is used by the server to resolve names.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. the router will discard the packet b. the router will send a time exceeded message to the source host

31. What characteristic of an UTP helps reduce interference?
A. DB 60 b. Winchester 15-pin c. smart serial
Flash
A. copper UTP b. optical fiber
Twisting of the cables

32. What type of routing uses information that is manually entered into the routing table?
Static
TCP initializes the sequence numbers for the sessions.
UTP
Router(config)# interface FastEthernet 0/1

33. What event occurs during the 3-way handshake?
TCP initializes the sequence numbers for the sessions.
Destination is not contacted before a packet is sent.
To enable a receiving host to forward the data to the appropriate application.
A. replace a switch w/ a router b. subnet the new networks

34. Which IP packet field will prevent endless loops?
Time-to-live (TTL)
No collisions will occur on this link.
Destination is not contacted before a packet is sent.
A. replace a switch w/ a router b. subnet the new networks

35. What 2 type of cables would most commonly be used for new runs?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
A. Cat5 UTP b. Cat6 UTP
The physical address is added.

36. What is a characteristic of a single-mode fiber-optic cable?
To facilitate the entry and exit of data on media.
It uses lasers as the light source.
0 to 1023
Network Layer

37. 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?
It provides for the exchange of data over a common local media.
2046
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
As the commands are entered.

38. What are 3 common problems w/ large networks?
A. perform degradation b. security issues c. host identification
A. low overhead b. connectionless
172.16.192.160
Resolve IPv4 addresses to MAC addresses.

39. statements of IP adressing
It has expanded adressing capabilities.
It provides interface between applications on either end of the network.
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
A. DNS b. SMTP c. POP

40. What do you need to use for an initial configuration on a Cisco router?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Console interface
Router(config)# interface FastEthernet 0/1
Router(config)# hostname Costas

41. What is the primary purpose of Layer 4?
Network address
Identify processes or services that are communicating with end devices.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. router b. firewall

42. What is a characteristic of a logical point-to-point topology?
Hub
The MAC protocol can be very simple.
No collisions will occur on this link.
Source and Destination IP address

43. 2 functions of encapsulation
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
Create signals that represent the bits in each frame for the media.
Time-to-live (TTL)
Is a layer of specific encapsulation.

44. What application layer protocol is used to support file transfers between client and server?
FTP
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Minimal delays in data delivery.
Network Layer

45. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
When connecting a host to a switch.
A. goodput b. throughput c. bandwidth
Rollover cable
255.255.255.224

46. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
0 to 1023
255.255.255.0
Window Size
A. show startup-config b. show running-config

47. How many bits make up an IPv4 address?
A. application b. services
To facilitate the entry and exit of data on media.
Show Interfaces
32 bits

48. What do the intermediary devices in the network do?
Network Layer
A. MTA b. SMTP
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
The address of the router that the host will use to 'get to the other side'.

49. What are 2 common characteristics associated w/ dynamic routing protocols?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. application b. presentation c. session d. transmision e. network f. data link g. physical
SSH
It has expanded adressing capabilities.

50. What is a component of a routing table entry?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Router(config)# hostname Costas
Source Port
Next-Hop Address

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CCNA - 2

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