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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. 3 factors that should be considered when implementing Layer 2 protocols
Signal loss can be experienced.
A. show startup-config b. show running-config
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. router b. firewall

2. At which layers of the OSI model does ethernet operate?
RJ-45
The address of the router that the host will use to 'get to the other side'.
A. physical layer b. DLL layer
Hub

3. What is a benefit of a WAN?
Destination is not contacted before a packet is sent.
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Host mobility

4. What kind of problems are caused by excessive broadcast traffic on network segments?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Logical Link Control sublayer
Network Access
The MAC protocol can be very simple.

5. 3 properties of peer-2-peer applications
A. physical layer b. DLL layer
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
Logical Link Control sublayer
A. netstat -r b. route PRINT

6. What is a component of a routing table entry?
172.16.192.160
Fiber
Identify the device that allows local network computers to communicate w/ devices in other networks.
Next-Hop Address

7. 3 features that allow TCP to realibly and accurately track the transmission of data
A. router b. firewall
Network Access
Is a layer of specific encapsulation.
A. flow control b. session establishment c. numbering and sequencing

8. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
FTP
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A physical topology.

9. What event occurs during the 3-way handshake?
TCP initializes the sequence numbers for the sessions.
0 to 1023
32 bits
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

10. What is a characteristic of a single-mode fiber-optic cable?
It uses lasers as the light source.
It has expanded adressing capabilities.
The address of the router that the host will use to 'get to the other side'.
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

11. Why are port numbers included in the TCP header of a segment?
MAC
Create signals that represent the bits in each frame for the media.
To enable a receiving host to forward the data to the appropriate application.
TCP initializes the sequence numbers for the sessions.

12. Which characteristics describe fiber optic cable?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. MTA b. SMTP
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A physical topology.

13. What is a default gateway address?

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14. What are 2 forms of application layer software?
To enable a receiving host to forward the data to the appropriate application.
A. DNS b. SMTP c. POP
Source Port
A. application b. services

15. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
0 to 1023
255.255.255.224
Flash

16. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
Ctrl + Shift + 6
Source and Destination IP address
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

17. What are 2 protocols for transfering web resources?
The physical address is added.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. HTTP b. HTTPS
Destination Network Address

18. What are key considering factors when grouping hosts into common networks?
A. purpose b. geographic location c. ownership
Identify the device that allows local network computers to communicate w/ devices in other networks.
Rollover cable
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

19. In a connectionless system - What is correct?
Destination is not contacted before a packet is sent.
A. minimizing of collisions b. division into broadcast domains
No collisions will occur on this link.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

20. Important characteristic of UDP
Network
Minimal delays in data delivery.
A. flow control b. session establishment c. numbering and sequencing
It provides for the exchange of data over a common local media.

21. Which type of cable is most often associated w/ fiber-optic cable?
A. show startup-config b. show running-config
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 backbone cable.
To facilitate the entry and exit of data on media.

22. What causes crosstalk within cable pairs when using UTP?
8
The magnetic field around the adjacent pairs of wire.
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
255.255.255.224

23. What describes the purpose of default route?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
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
Ctrl + Shift + 6
To enable a receiving host to forward the data to the appropriate application.

24. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Rollover cable
DNS

25. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
When connecting a host to a switch.
172.16.192.160
255.255.255.0
A. decentralized resources b. resource sharing w/o a dedicated server

26. What are 3 properties of contention-based media access for a shared media?
Router
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. non-deterministic b. less overhead c. collisions exist
A. performance degradation b. security issues c. host identification

27. What is the role of the OSI Application Layer?
Next-Hop Address
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
It provides interface between applications on either end of the network.
Rollover cable

28. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. larger address space b. data types and classes of service c. authentication and encryption
Ctrl + Shift + 6
A. DB 60 b. Winchester 15-pin c. smart serial
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

29. 2 features that make switches preferable to hubs
It uses support from the lower layers to distinguish between connections to the service.
Application Layer
A physical topology.
A. minimizing of collisions b. division into broadcast domains

30. What is the primary function of encapsulating packets into frames?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
MAC
To facilitate the entry and exit of data on media.
A. servers b. routers c. network printers

31. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Identify the device that allows local network computers to communicate w/ devices in other networks.
Fiber
Switch
Console

32. To make a console connection from a comp to a Cisco router - what cable should be used?
A. it has centralized administration b. security is easier to enforce
A. purpose b. geographic location c. ownership
Rollover cable
Identify processes or services that are communicating with end devices.

33. 2 most commonly used media types in ethernet networks
Signal loss can be experienced.
A. copper UTP b. optical fiber
It provides for the exchange of data over a common local media.
A. Physical b. Data Link

34. What can get you to an outside network?
Host A
A default gateway (router).
Rollover cable
RJ-45

35. 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?
Create signals that represent the bits in each frame for the media.
The address of the router that the host will use to 'get to the other side'.
A. larger address space b. data types and classes of service c. authentication and encryption
2046

36. In an IPv4 environment - what information is used by the router to forward data packets from one interface of a router to another?
A. MTA b. SMTP
Network Media Control
Destination Network Address
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

37. 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?
Collisions can decrease network performance.
Rollover cable
0 to 1023
172.16.192.160

38. What is PDU?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
It uses support from the lower layers to distinguish between connections to the service.
Is a layer of specific encapsulation.
2046

39. What are 2 commands used to view a host routing table?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
It uses lasers as the light source.
Time-to-live (TTL)
A. netstat -r b. route PRINT

40. When destination network is not in the routing table - What are 2 actions the router might take?
A random delay helps prevent the stations from experiencing another collision during transmission.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Source and Destination IP address
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

41. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A random delay helps prevent the stations from experiencing another collision during transmission.
They must wait until the first hosts finish transfering the media.
Destination is not contacted before a packet is sent.
Hosts return to listen-before-transmit mode.

42. What do end devices do?
Originate data flow.
Window Size
A. show startup-config b. show running-config
It uses support from the lower layers to distinguish between connections to the service.

43. 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. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
To enable a receiving host to forward the data to the appropriate application.
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
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

44. What are 3 common problems w/ large networks?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. perform degradation b. security issues c. host identification
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Rollover cable

45. Group of hosts that have identical bit patterns in the high order bits of their addresses
Console interface
Transport
OTDR
Network

46. An admin needs to keep contents private - which access method should he use?
Hub
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. HTTP b. HTTPS
SSH

47. After an ethernet collision - which device has priority to transmit data?
Window Size
Any device whose backoff timer expires first.
The MAC protocol can be very simple.
A. physical layer b. DLL layer

48. 3 protocols that operate in the application layer
A. DNS b. SMTP c. POP
Switch
A. show startup-config b. show running-config
No collisions will occur on this link.

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. physical layer b. DLL layer
Static
A. goodput b. throughput c. bandwidth
A. the router will discard the packet b. the router will send a time exceeded message to the source host

50. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
RJ-45
80 (HTTP)
They must wait until the first hosts finish transfering the media.
Supports error detection.