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CCNA - 2

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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 networking devices are recommended to be assigned static IP addresses?
172.16.192.160
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. servers b. routers c. network printers

2. What is the primary purpose of Layer 4?
A. MTA b. SMTP
Identify processes or services that are communicating with end devices.
A. media sharing b. logical topology
0 to 1023

3. Why are port numbers included in the TCP header of a segment?
A. purpose b. geographic location c. ownership
MAC
It uses support from the lower layers to distinguish between connections to the service.
To enable a receiving host to forward the data to the appropriate application.

4. What is the purpose of a default gateway?
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
FTP
Identify the device that allows local network computers to communicate w/ devices in other networks.
IP Protocol

5. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Network address
SMB
Network Layer Packet
Network Access

6. Which device is used to create or divide broadcast domains?
Router
Network Layer Packet
8
A. identifies the communicating applications b. identifies multiple conversations between the hosts

7. What is a component of a routing table entry?
Next-Hop Address
SSH
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
UTP

8. What is the function of the DLL?
A. hot keys b. context-sensitive c. command syntax check
The address of the router that the host will use to 'get to the other side'.
It provides for the exchange of data over a common local media.
Supports error detection.

9. What do you need to use for an initial configuration on a Cisco router?
Console interface
UDP
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. goodput b. throughput c. bandwidth

10. What are 2 layers of the OSI model that have the same functions as the TCP/IP Network Application Layer?
A. Physical b. Data Link
A default gateway (router).
To enable a receiving host to forward the data to the appropriate application.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

11. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
A. decentralized resources b. resource sharing w/o a dedicated server
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
Hub
Originate data flow.

12. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A physical topology.
A. DB 60 b. Winchester 15-pin c. smart serial
Binary ANDing

13. If you have a full-duplex operational network - what can happen?
A random delay helps prevent the stations from experiencing another collision during transmission.
Network Layer Packet
Fiber
No collisions will occur on this link.

14. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Identify processes or services that are communicating with end devices.
Twisting of the cables
Transport
Network Layer

15. 3 functions of the upper data link sublayer in the OSI model
Network address
A. media sharing b. logical topology
Source Port
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

16. What information is added during encapsulation at OSI Layer 3?
A. goodput b. throughput c. bandwidth
Show Interfaces
Source and Destination IP address
The physical address is added.

17. How does the application layer on a server process multiple client requests for services?
Transport
It uses support from the lower layers to distinguish between connections to the service.
A. router b. firewall
Rollover cable

18. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
It uses support from the lower layers to distinguish between connections to the service.
Is used by the server to resolve names.
SMB
Router(config)# hostname Costas

19. When a network service fails - which port is most often used to access a router for management purposes?
Static
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. 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
Console

20. What is a characteristic of a single-mode fiber-optic cable?
A. they initiate data exchanges b. they may upload data to servers
It uses lasers as the light source.
Collisions can decrease network performance.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

21. What is the purpose of the TCP/IP Network Application Layer?
Wireless
OTDR
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Network Media Control

22. What is the purpose of resource records in DNS?
Is used by the server to resolve names.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. application b. services
Host A

23. What can be a problem that is reduced by adding end-to-end addressing?
Is a layer of specific encapsulation.
It reduces unnecessary broadcasts.
2046
As the commands are entered.

24. What command is used to change the default name to 'Costas'?
255.255.255.0
Rollover cable
Router(config)# hostname Costas
Network address

25. 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
Identify processes or services that are communicating with end devices.
A. copper UTP b. optical fiber
Application Layer

26. At which layer of the TCP/IP model does ethernet operate?
Source and Destination IP address
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
Is a layer of specific encapsulation.
Network Access

27. 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
It uses lasers as the light source.
It provides for the exchange of data over a common local media.
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)

28. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
The address of the router that the host will use to 'get to the other side'.
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
SSH
Window Size

29. What are 2 features of User Diagram Protocol (UDP)?
A. low overhead b. connectionless
Network Access
A. non-deterministic b. less overhead c. collisions exist
Static

30. What are key considering factors when grouping hosts into common networks?
A. it has centralized administration b. security is easier to enforce
A. purpose b. geographic location c. ownership
Rollover cable
255.255.255.0

31. What is a protocol that provides connectionless network layer services?
A. servers b. routers c. network printers
A. replace a switch w/ a router b. subnet the new networks
IP Protocol
It does not support encryption.

32. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. enable mode b. priviledge executive mode
Transport
Logical Link Control sublayer

33. During a TCP session - if packets arrive out of order - what will happen?
The packets will be delivered and reassembled at destination.
Wireless
A. perform degradation b. security issues c. host identification
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

34. An admin needs to keep contents private - which access method should he use?
IP Protocol
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
SSH

35. statements of IP adressing
Supports error detection.
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 random delay helps prevent the stations from experiencing another collision during transmission.
Network Layer Packet

36. 3 facts about the network portion of an IPv4 address
255.255.255.0
Window Size
The physical address is added.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet

37. 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?
Originate data flow.
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. show startup-config b. show running-config
Time-to-live (TTL)

38. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
Network
It provides interface between applications on either end of the network.
A. next-hop b. metric/interface c. destination network address

39. What device can check for faults - integrity and performance of media?
OTDR
Time-to-live (TTL)
32 bits
Hosts return to listen-before-transmit mode.

40. What is PDU?
Resolve IPv4 addresses to MAC addresses.
Is a layer of specific encapsulation.
Transport
A physical topology.

41. What do end devices do?
Destination is not contacted before a packet is sent.
Originate data flow.
UDP
OTDR

42. What does the IEEE 802.2 standard represent in Ethernet technologies?
Logical Link Control sublayer
They must wait until the first hosts finish transfering the media.
A. non-deterministic b. less overhead c. collisions exist
A. they initiate data exchanges b. they may upload data to servers

43. Which characteristics describe fiber optic cable?
A. Cat5 UTP b. Cat6 UTP
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. not affected by EMI of RFI b. most expensive type of LAN cabling

44. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
It provides for the exchange of data over a common local media.
Wireless
A random delay helps prevent the stations from experiencing another collision during transmission.

45. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
255.255.255.224
A. router b. firewall
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Wireless

46. Which type of cable is most often associated w/ fiber-optic cable?
A backbone cable.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
FTP

47. Why is flow control used for TCP data transfer?
To prevent the receiver from being overwhelmed by incoming data.
A. enable mode b. priviledge executive mode
Next-Hop Address
It has expanded adressing capabilities.

48. What do the intermediary devices in the network do?
A. minimizing of collisions b. division into broadcast domains
Next-Hop Address
A. physical layer b. DLL layer
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

49. What are 3 properties of contention-based media access for a shared media?
A. non-deterministic b. less overhead c. collisions exist
The packets will be delivered and reassembled at destination.
Fiber
A. the router will discard the packet b. the router will send a time exceeded message to the source host

50. At which layers of the OSI model does ethernet operate?
Network Layer
A. servers b. routers c. network printers
A. physical layer b. DLL layer
Rollover cable

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CCNA - 2

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