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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. statements of IP adressing
DNS
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. 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
It does not support encryption.

2. At which layers of the OSI model does ethernet operate?
A. physical layer b. DLL layer
Window Size
Time-to-live (TTL)
The destination host address.

3. 3 factors that should be considered when implementing Layer 2 protocols
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. Cat5 UTP b. Cat6 UTP
Router(config)# interface FastEthernet 0/1
To facilitate the entry and exit of data on media.

4. What is the purpose of resource records in DNS?
Is used by the server to resolve names.
A. decentralized resources b. resource sharing w/o a dedicated server
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
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

5. If you have a full-duplex operational network - what can happen?
To enable a receiving host to forward the data to the appropriate application.
8
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
No collisions will occur on this link.

6. Intermediary devices used to implement security between networks
A. router b. firewall
A. Cat5 UTP b. Cat6 UTP
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. media sharing b. logical topology

7. What are the advantages of using a client-server model?
As the commands are entered.
Network
A. it has centralized administration b. security is easier to enforce
Logical Link Control sublayer

8. What subnet mask will an admin assign to the network address 172.30.1.0 if its possible to have 254 hosts?
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
255.255.255.0
A. hot keys b. context-sensitive c. command syntax check
Next-Hop Address

9. What do you need to use for an initial configuration on a Cisco router?
Host A
Console
Console interface
RJ-45

10. During encapsulation - what happens in the Data Link Layer?
Host A
The physical address is added.
It reduces unnecessary broadcasts.
Source Port

11. What are 3 common problems w/ large networks?
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. perform degradation b. security issues c. host identification
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. decentralized resources b. resource sharing w/o a dedicated server

12. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
Is a layer of specific encapsulation.
A random delay helps prevent the stations from experiencing another collision during transmission.
MAC
Show Interfaces

13. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
The MAC protocol can be very simple.
Destination is not contacted before a packet is sent.
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. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

14. What layer encapsulates segments into packets?
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
A physical topology.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Network Layer

15. 3 primary functions of the data link layer encapsulation
A. perform degradation b. security issues c. host identification
Minimal delays in data delivery.
A. addressing b. error detection c. frame delimiting
A. goodput b. throughput c. bandwidth

16. Default Gateway is incorrect on the host - What is the impact on the communications?
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Network Layer
A. show startup-config b. show running-config
A. router b. firewall

17. What command can be used to determine if the router has experienced any input or output errors?
Show Interfaces
A. physical layer b. DLL layer
Source and Destination Ports
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

18. 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
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
Transport
Next-Hop Address

19. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A. minimizing of collisions b. division into broadcast domains
A random delay helps prevent the stations from experiencing another collision during transmission.
Router(config)# hostname Costas
Host A

20. What event occurs during the 3-way handshake?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
Network Layer Packet
TCP initializes the sequence numbers for the sessions.
Router

21. What do the intermediary devices in the network do?
Network address
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. purpose b. geographic location c. ownership
Minimal delays in data delivery.

22. If host A's DG is 10.0.0.1 and host B's DG is 10.0.0.2 - when the router's IP address is 10.0.0.1. Which one will go through?
A. low overhead b. connectionless
Source and Destination Ports
Twisting of the cables
Host A

23. When is a straight-through cable used in a network?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Router(config)# hostname Costas
When connecting a host to a switch.

24. What can get you to an outside network?
UDP
A default gateway (router).
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
Is a layer of specific encapsulation.

25. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
A. HTTP b. HTTPS
The destination host address.
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
A. enable mode b. priviledge executive mode

26. 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. security is difficult to enforce b. if one of the computers is responding to file sharing requests - that computer is functioning as a server
Source and Destination IP address
80 (HTTP)
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

27. 2 most commonly used media types in ethernet networks
172.16.192.160
Minimal delays in data delivery.
A. goodput b. throughput c. bandwidth
A. copper UTP b. optical fiber

28. 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. larger address space b. data types and classes of service c. authentication and encryption
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Hosts return to listen-before-transmit mode.

29. 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
SMB
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

30. After an ethernet collision - which device has priority to transmit data?
Static
A. perform degradation b. security issues c. host identification
Any device whose backoff timer expires first.
A. they initiate data exchanges b. they may upload data to servers

31. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
A. HTTP b. HTTPS
255.255.255.0
A random delay helps prevent the stations from experiencing another collision during transmission.

32. 3 common problems w/ a large network
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. performance degradation b. security issues c. host identification
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Rollover cable

33. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
A default gateway (router).
A. enable mode b. priviledge executive mode
A. physical layer b. DLL layer

34. What is a characteristic of a single-mode fiber-optic cable?
It uses lasers as the light source.
It reduces unnecessary broadcasts.
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
A. it has centralized administration b. security is easier to enforce

35. 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. show startup-config b. show running-config
Network portion
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
8

36. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
IP Protocol
Hosts return to listen-before-transmit mode.
Any device whose backoff timer expires first.
Transport

37. 2 characteristics of peer-2-peer
A default gateway (router).
It uses lasers as the light source.
A. copper UTP b. optical fiber
A. decentralized resources b. resource sharing w/o a dedicated server

38. An admin wants to evaluate all traffic in a network. To ensure that all packets are captured - what network device should be used?
The destination host address.
Network portion
Resolve IPv4 addresses to MAC addresses.
Hub

39. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
It uses lasers as the light source.
Source Port
IP is not properly installed
UTP

40. At which layer of the TCP/IP model does ethernet operate?
Network Access
A. not affected by EMI of RFI b. most expensive type of LAN cabling
255.255.255.0
It does not support encryption.

41. There are 4 different hosts connected to a hub - media is being transfered between 2 of them but the other 2 will also like to transfer media. What must the latest hosts do to transfer the media?
It provides for the exchange of data over a common local media.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
They must wait until the first hosts finish transfering the media.
Static

42. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
Flash
It provides for the exchange of data over a common local media.
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

43. What kind of problems are caused by excessive broadcast traffic on network segments?
A. low overhead b. connectionless
No collisions will occur on this link.
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
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

44. Which portion of the network layer address does a router use to forward packets?
255.255.255.224
Network portion
A default gateway (router).
Network Layer

45. 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. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
A. performance 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
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

46. 3 characteristics of valid Ethernet Layer 2 addresses
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Ctrl + Shift + 6
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
DNS

47. What type of network cable is used between a terminal and a console port?
172.16.192.160
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
The packets will be delivered and reassembled at destination.
Rollover cable

48. When a device is moved from one network to the other...?
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
A. larger address space b. data types and classes of service c. authentication and encryption
Network Access

49. What are 3 properties of contention-based media access for a shared media?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. addressing b. error detection c. frame delimiting
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. non-deterministic b. less overhead c. collisions exist

50. What is a disadvantage of Telnet?
A. goodput b. throughput c. bandwidth
A. DB 60 b. Winchester 15-pin c. smart serial
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
It does not support encryption.