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CCNA - 2

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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. When destination network is not in the routing table - What are 2 actions the router might take?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
Binary ANDing
The MAC protocol can be very simple.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

2. When a device is moved from one network to the other...?
To enable a receiving host to forward the data to the appropriate application.
A. application b. services
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
TCP initializes the sequence numbers for the sessions.

3. What is an effect of improperly applying a network cable connector?
Signal loss can be experienced.
Originate data flow.
A. addressing b. error detection c. frame delimiting
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

4. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
TCP initializes the sequence numbers for the sessions.
Physical
A. DNS b. SMTP c. POP
To enable a receiving host to forward the data to the appropriate application.

5. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
Destination Network Address
255.255.255.224
A. low overhead b. connectionless
To prevent the receiver from being overwhelmed by incoming data.

6. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
Hub
Collisions can decrease network performance.
Switch
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

7. At which layers of the OSI model does ethernet operate?
A. non-deterministic b. less overhead c. collisions exist
Time-to-live (TTL)
A. minimizing of collisions b. division into broadcast domains
A. physical layer b. DLL layer

8. When is a straight-through cable used in a network?
A. minimizing of collisions b. division into broadcast domains
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
When connecting a host to a switch.
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

9. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
MAC
It provides for the exchange of data over a common local media.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Originate data flow.

10. What is the purpose of resource records in DNS?
A. copper UTP b. optical fiber
Is used by the server to resolve names.
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
172.16.192.160

11. Which device is used to create or divide broadcast domains?
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. low overhead b. connectionless
A. decentralized resources b. resource sharing w/o a dedicated server
Router

12. Which combination of keys can be used to interrupt a ping or traceroute process?
Next-Hop Address
A. goodput b. throughput c. bandwidth
255.255.255.224
Ctrl + Shift + 6

13. What do you need to use for an initial configuration on a Cisco router?
A. Cat5 UTP b. Cat6 UTP
A. flow control b. session establishment c. numbering and sequencing
Console interface
Host mobility

14. What is a characteristic of a logical point-to-point topology?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
The MAC protocol can be very simple.
Source Port
Originate data flow.

15. What is the primary rope of the physical layer in transmitting data?
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
A. HTTP b. HTTPS
As the commands are entered.
Create signals that represent the bits in each frame for the media.

16. 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?
Is a layer of specific encapsulation.
A backbone cable.
172.16.192.160
Source Port

17. 3 measures of data transfer
Rollover cable
A. larger address space b. data types and classes of service c. authentication and encryption
A. goodput b. throughput c. bandwidth
A backbone cable.

18. What is a protocol that provides connectionless network layer services?
Binary ANDing
A. not affected by EMI of RFI b. most expensive type of LAN cabling
IP Protocol
To enable a receiving host to forward the data to the appropriate application.

19. What is a drawback of the CSMA/CD access method?
A random delay helps prevent the stations from experiencing another collision during transmission.
A. netstat -r b. route PRINT
A. low overhead b. connectionless
Collisions can decrease network performance.

20. 3 properties of peer-2-peer applications
Network Access
Fiber
Time-to-live (TTL)
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

21. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
Source Port
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
Network Layer Packet
0 to 1023

22. What are 2 common characteristics associated w/ dynamic routing protocols?
Hosts return to listen-before-transmit mode.
The magnetic field around the adjacent pairs of wire.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
FTP

23. 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. the router will discard the packet b. the router will send a time exceeded message to the source host
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. show startup-config b. show running-config
Is a layer of specific encapsulation.

24. What type of network cable is used between a terminal and a console port?
It provides interface between applications on either end of the network.
Network portion
Rollover cable
Supports error detection.

25. What is the primary purpose of ARP?
Supports error detection.
172.16.192.160
Collisions can decrease network performance.
Resolve IPv4 addresses to MAC addresses.

26. What is the primary purpose of Layer 4?
A. servers b. routers c. network printers
Identify processes or services that are communicating with end devices.
Minimal delays in data delivery.
As the commands are entered.

27. Which 2 options represent Layer 4 addressing?
To facilitate the entry and exit of data on media.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Binary ANDing
A. show startup-config b. show running-config

28. What is the purpose of the TCP/IP Network Application Layer?
Wireless
The physical address is added.
Network Media Control
Minimal delays in data delivery.

29. Network Protocols
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. Cat5 UTP b. Cat6 UTP
It has expanded adressing capabilities.
Transport

30. What determines the method of media access control?
OTDR
A. low overhead b. connectionless
The physical address is added.
A. media sharing b. logical topology

31. 3 features that allow TCP to realibly and accurately track the transmission of data
A. flow control b. session establishment c. numbering and sequencing
Wireless
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. application b. presentation c. session d. transmision e. network f. data link g. physical

32. 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
When connecting a host to a switch.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. MTA b. SMTP

33. 3 statements about routes and their use
Network address
RJ-45
Host mobility
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. What kind of problems are caused by excessive broadcast traffic on network segments?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Router(config)# hostname Costas
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A random delay helps prevent the stations from experiencing another collision during transmission.

35. 3 functions of the upper data link sublayer in the OSI model
Collisions can decrease network performance.
Transport
RJ-45
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

36. What are 2 email components used to forward mail between servers?
A default gateway (router).
It uses lasers as the light source.
No collisions will occur on this link.
A. MTA b. SMTP

37. Which layer supplies services and allows user interface?
Show Interfaces
Application Layer
The address of the router that the host will use to 'get to the other side'.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions

38. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
Network Access
Transport
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
Physical

39. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
No collisions will occur on this link.
A. copper UTP b. optical fiber
172.16.192.160
Network address

40. What is dinamically selected by the source host when forwarding data?
A. next-hop b. metric/interface c. destination network address
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Source Port
A. DNS b. SMTP c. POP

41. What is the primary reason for developing IPv6?
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. larger address space b. data types and classes of service c. authentication and encryption
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
It has expanded adressing capabilities.

42. What is the purpose of a default gateway?
A. minimizing of collisions b. division into broadcast domains
Identify the device that allows local network computers to communicate w/ devices in other networks.
IP is not properly installed
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

43. 3 common problems w/ a large network
Network Media Control
A. performance degradation b. security issues c. host identification
Show Interfaces
Network

44. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
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
Signal loss can be experienced.
It has expanded adressing capabilities.

45. What command will you use to place the router into the correct mode to configure an appropiate interface to connect a LAN?
Router(config)# interface FastEthernet 0/1
Application Layer
Rollover cable
172.16.192.160

46. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
It has expanded adressing capabilities.
A. they initiate data exchanges b. they may upload data to servers
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

47. Important characteristic of UDP
A. replace a switch w/ a router b. subnet the new networks
Supports error detection.
Twisting of the cables
Minimal delays in data delivery.

48. 2 features that make switches preferable to hubs
A. minimizing of collisions b. division into broadcast domains
Hosts return to listen-before-transmit mode.
It provides interface between applications on either end of the network.
UDP

49. 3 factors that should be considered when implementing Layer 2 protocols
Flash
A. performance degradation b. security issues c. host identification
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
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

50. What are 3 properties of contention-based media access for a shared media?
RJ-45
Network Layer
A. non-deterministic b. less overhead c. collisions exist
A. they initiate data exchanges b. they may upload data to servers

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CCNA - 2

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