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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. What event occurs during the 3-way handshake?
FTP
MAC
TCP initializes the sequence numbers for the sessions.
It reduces unnecessary broadcasts.

2. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Resolve IPv4 addresses to MAC addresses.
Minimal delays in data delivery.
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

3. In business LANs - which connector is used w/ twisted-pair networking cable?
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. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
RJ-45
Ctrl + Shift + 6

4. If you have a small network w/ 3 computers...
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. application b. presentation c. session d. transmision e. network f. data link g. physical
A. replace a switch w/ a router b. subnet the new networks
A random delay helps prevent the stations from experiencing another collision during transmission.

5. 3 properties of peer-2-peer applications
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
Source Port
A. performance degradation b. security issues c. host identification
A default gateway (router).

6. What kind of problems are caused by excessive broadcast traffic on network segments?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
SMB
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. not affected by EMI of RFI b. most expensive type of LAN cabling

7. Why are port numbers included in the TCP header of a segment?
A. flow control b. session establishment c. numbering and sequencing
Minimal delays in data delivery.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
To enable a receiving host to forward the data to the appropriate application.

8. What is a protocol that provides connectionless network layer services?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
IP Protocol
A. enable mode b. priviledge executive mode

9. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
Show Interfaces
The MAC protocol can be very simple.
A. Physical b. Data Link

10. After an ethernet collision - which device has priority to transmit data?
The MAC protocol can be very simple.
0 to 1023
Any device whose backoff timer expires first.
UTP

11. 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. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Logical Link Control sublayer
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Identify the device that allows local network computers to communicate w/ devices in other networks.

12. 3 factors that should be considered when implementing Layer 2 protocols
Twisting of the cables
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Is a layer of specific encapsulation.

13. What do end devices do?
Flash
Rollover cable
Originate data flow.
0 to 1023

14. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
MAC
It does not support encryption.
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

15. 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. larger address space b. data types and classes of service c. authentication and encryption
A default gateway (router).
80 (HTTP)
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

16. 2 characteristics of peer-2-peer
Host mobility
A. it has centralized administration b. security is easier to enforce
A. decentralized resources b. resource sharing w/o a dedicated server
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

17. 2 most commonly used media types in ethernet networks
A. copper UTP b. optical fiber
Source and Destination IP address
A. enable mode b. priviledge executive mode
Network

18. Statements that describe LAN
Console interface
The address of the router that the host will use to 'get to the other side'.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
0 to 1023

19. What are 3 pieces of info about a route contained in a routing table?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. next-hop b. metric/interface c. destination network address
A. larger address space b. data types and classes of service c. authentication and encryption
Fiber

20. An admin needs to keep contents private - which access method should he use?
Minimal delays in data delivery.
SSH
Identify the device that allows local network computers to communicate w/ devices in other networks.
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

21. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
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
It provides interface between applications on either end of the network.
A. not affected by EMI of RFI b. most expensive type of LAN cabling

22. What is a benefit of a WAN?
Host mobility
Identify the device that allows local network computers to communicate w/ devices in other networks.
RJ-45
It uses support from the lower layers to distinguish between connections to the service.

23. What information is added during encapsulation at OSI Layer 3?
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
Source and Destination IP address
Network Layer Packet
The packets will be delivered and reassembled at destination.

24. 3 features of IPv6
The physical address is added.
Ctrl + Shift + 6
A. larger address space b. data types and classes of service c. authentication and encryption
Logical Link Control sublayer

25. When destination network is not in the routing table - What are 2 actions the router might take?
Twisting of the cables
A. Physical b. Data Link
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. application b. services

26. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
Router(config)# interface FastEthernet 0/1
Physical
Is used by the server to resolve names.
Collisions can decrease network performance.

27. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
A. next-hop b. metric/interface c. destination network address
Ctrl + Shift + 6
The address of the router that the host will use to 'get to the other side'.

28. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
It does not support encryption.
Window Size
A. replace a switch w/ a router b. subnet the new networks
Wireless

29. What is an effect of improperly applying a network cable connector?
Network Layer
Flash
Signal loss can be experienced.
It reduces unnecessary broadcasts.

30. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
To facilitate the entry and exit of data on media.
255.255.255.0
Hosts return to listen-before-transmit mode.
As the commands are entered.

31. 3 protocols that operate in the application layer
8
To prevent the receiver from being overwhelmed by incoming data.
A. DNS b. SMTP c. POP
Transport

32. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
Source and Destination IP address
SMB
A. flow control b. session establishment c. numbering and sequencing

33. What is a default gateway address?

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34. Which layer supplies services and allows user interface?
DNS
No collisions will occur on this link.
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
Application Layer

35. What correctly describes a MAC address?
A. hot keys b. context-sensitive c. command syntax check
Console
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
To facilitate the entry and exit of data on media.

36. 3 functions of the upper data link sublayer in the OSI model
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
It uses lasers as the light source.
Fiber
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

37. What is a disadvantage of Telnet?
It does not support encryption.
A. copper UTP b. optical fiber
The MAC protocol can be very simple.
A random delay helps prevent the stations from experiencing another collision during transmission.

38. If you have a full-duplex operational network - what can happen?
Is a layer of specific encapsulation.
No collisions will occur on this link.
Source and Destination IP address
IP Protocol

39. How does the application layer on a server process multiple client requests for services?
It uses lasers as the light source.
Network address
80 (HTTP)
It uses support from the lower layers to distinguish between connections to the service.

40. When do changes take effect in a Cisco router?
It provides interface between applications on either end of the network.
As the commands are entered.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. copper UTP b. optical fiber

41. After a routers ends its boot sequence - the admin wants to check the routers config. From the EXEC mode - which commands can the admin use?
A physical topology.
A. Cat5 UTP b. Cat6 UTP
A. show startup-config b. show running-config
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

42. What is the purpose of the preamble in an ethernet frame?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Fiber
A. next-hop b. metric/interface c. destination network address

43. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Is used by the server to resolve names.
Fiber
OTDR
A. enable mode b. priviledge executive mode

44. Which transport layer protocol provides low overhead and is used for applications that do not require reliable data delivery?
UDP
To prevent the receiver from being overwhelmed by incoming data.
A. DB 60 b. Winchester 15-pin c. smart serial
A. media sharing b. logical topology

45. 2 features that make switches preferable to hubs
A. minimizing of collisions b. division into broadcast domains
Flash
Static
Hosts return to listen-before-transmit mode.

46. What are 2 protocols for transfering web resources?
A. perform degradation b. security issues c. host identification
A backbone cable.
A. HTTP b. HTTPS
Is used by the server to resolve names.

47. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
A. identifies the communicating applications b. identifies multiple conversations between the 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)
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
Supports error detection.

48. To make a console connection from a comp to a Cisco router - what cable should be used?
Rollover cable
A. DNS b. SMTP c. POP
Network
Create signals that represent the bits in each frame for the media.

49. What layer encapsulates segments into packets?
Network Layer
The address of the router that the host will use to 'get to the other side'.
Application Layer
IP is not properly installed

50. When a network service fails - which port is most often used to access a router for management purposes?
Resolve IPv4 addresses to MAC addresses.
Console
Destination is not contacted before a packet is sent.
Binary ANDing