Test your basic knowledge |

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 are 2 email components used to forward mail between servers?
The address of the router that the host will use to 'get to the other side'.
Console
A. MTA b. SMTP
The destination host address.

2. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
Flash
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
255.255.255.224
A backbone cable.

3. What is the role of the OSI Application Layer?
It provides interface between applications on either end of the network.
A random delay helps prevent the stations from experiencing another collision during transmission.
A physical topology.
No collisions will occur on this link.

4. There are too many broadcasts on switches - what can be done?
A. replace a switch w/ a router b. subnet the new networks
IP Protocol
A. hot keys b. context-sensitive c. command syntax check
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

5. What can get you to an outside network?
A default gateway (router).
Network portion
A. physical layer b. DLL layer
Transport

6. At which layer of the TCP/IP model does ethernet operate?
Router
A physical topology.
Network Access
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

7. What method of signal transmission uses radio waves to carry signals?
A. MTA b. SMTP
Source and Destination Ports
Wireless
A. it has centralized administration b. security is easier to enforce

8. What is the purpose of a default gateway?
A. flow control b. session establishment c. numbering and sequencing
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
Identify the device that allows local network computers to communicate w/ devices in other networks.
A. it has centralized administration b. security is easier to enforce

9. What is the purpose of resource records in DNS?
172.16.192.160
Router
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Is used by the server to resolve names.

10. Group of hosts that have identical bit patterns in the high order bits of their addresses
A. netstat -r b. route PRINT
Network
Identify processes or services that are communicating with end devices.
Destination Network Address

11. What are 2 protocols for transfering web resources?
A. HTTP b. HTTPS
Transport
A. non-deterministic b. less overhead c. collisions exist
A. physical layer b. DLL layer

12. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
Console interface
It provides for the exchange of data over a common local media.
Twisting of the cables
A. enable mode b. priviledge executive mode

13. What characteristic of an UTP helps reduce interference?
Router(config)# interface FastEthernet 0/1
Rollover cable
Twisting of the cables
Binary ANDing

14. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A random delay helps prevent the stations from experiencing another collision during transmission.
UDP
Is used by the server to resolve names.
A. MTA b. SMTP

15. What correctly describes a MAC address?
The destination host address.
A. larger address space b. data types and classes of service c. authentication and encryption
The magnetic field around the adjacent pairs of wire.
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

16. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
Next-Hop Address
It has expanded adressing capabilities.
To prevent the receiver from being overwhelmed by incoming data.
SMB

17. Intermediary devices used to implement security between networks
Time-to-live (TTL)
The MAC protocol can be very simple.
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
A. router b. firewall

18. What is an effect of improperly applying a network cable connector?
Network Layer
IP is not properly installed
A. next-hop b. metric/interface c. destination network address
Signal loss can be experienced.

19. Where is the IOS file stored at?
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
Flash
To facilitate the entry and exit of data on media.
Router

20. What is PDU?
MAC
The physical address is added.
Fiber
Is a layer of specific encapsulation.

21. Why is flow control used for TCP data transfer?
Minimal delays in data delivery.
To prevent the receiver from being overwhelmed by incoming data.
Logical Link Control sublayer
A. copper UTP b. optical fiber

22. What causes crosstalk within cable pairs when using UTP?
A. MTA b. SMTP
A. enable mode b. priviledge executive mode
The magnetic field around the adjacent pairs of wire.
A. copper UTP b. optical fiber

23. What is the purpose of the preamble in an ethernet frame?
TCP initializes the sequence numbers for the sessions.
MAC
Identify the device that allows local network computers to communicate w/ devices in other networks.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

24. In a connectionless system - What is correct?
Source and Destination IP address
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
255.255.255.0
Destination is not contacted before a packet is sent.

25. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
Network address
A. Cat5 UTP b. Cat6 UTP
When connecting a host to a switch.

26. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Network portion
A. Cat5 UTP b. Cat6 UTP
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
Network Layer Packet

27. 3 features of IPv6
It uses support from the lower layers to distinguish between connections to the service.
A. larger address space b. data types and classes of service c. authentication and encryption
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. flow control b. session establishment c. numbering and sequencing

28. 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
Ctrl + Shift + 6
A random delay helps prevent the stations from experiencing another collision during transmission.
80 (HTTP)

29. What is the primary purpose of ARP?
SMB
Transport
Resolve IPv4 addresses to MAC addresses.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.

30. If you have a full-duplex operational network - what can happen?
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
No collisions will occur on this link.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

31. Which portion of the network layer address does a router use to forward packets?
Network portion
A. HTTP b. HTTPS
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. goodput b. throughput c. bandwidth

32. Which type of cable is most often associated w/ fiber-optic cable?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
255.255.255.0
A backbone cable.
A random delay helps prevent the stations from experiencing another collision during transmission.

33. Why are port numbers included in the TCP header of a segment?
A. next-hop b. metric/interface c. destination network address
To enable a receiving host to forward the data to the appropriate application.
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
Static

34. Important characteristic of UDP
Minimal delays in data delivery.
Destination Network Address
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
Hub

35. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
80 (HTTP)
It uses lasers as the light source.
To enable a receiving host to forward the data to the appropriate application.
It uses support from the lower layers to distinguish between connections to the service.

36. What is a component of a routing table entry?
Rollover cable
Next-Hop Address
A random delay helps prevent the stations from experiencing another collision during transmission.
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format

37. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
0 to 1023
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
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

38. 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. perform degradation b. security issues c. host identification
Console interface
A. application b. services

39. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
RJ-45
The MAC protocol can be very simple.
A. media sharing b. logical topology
Fiber

40. 3 factors that should be considered when implementing Layer 2 protocols
A. router b. firewall
Hub
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

41. Which device is used to create or divide broadcast domains?
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
Next-Hop Address
Router
Router(config)# hostname Costas

42. What 2 type of cables would most commonly be used for new runs?
A. Cat5 UTP b. Cat6 UTP
A. MTA b. SMTP
Supports error detection.
8

43. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
A. non-deterministic b. less overhead c. collisions exist
Host A
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Supports error detection.

44. What is a protocol that provides connectionless network layer services?
IP Protocol
A. goodput b. throughput c. bandwidth
The destination host address.
Logical Link Control sublayer

45. During encapsulation - what happens in the Data Link Layer?
255.255.255.224
A. router b. firewall
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
The physical address is added.

46. What is an automated service that matches resource names w/ required IP addresses?
DNS
To prevent the receiver from being overwhelmed by incoming data.
Network address
SMB

47. What is a drawback of the CSMA/CD access method?
Destination Network Address
A. MTA b. SMTP
Host mobility
Collisions can decrease network performance.

48. If you have a PC - 3 routers and a Laptop... How many unique CRC calculation will take place as traffic routes from the PC to the Laptop?
80 (HTTP)
Minimal delays in data delivery.
A physical topology.
8

49. What do the intermediary devices in the network do?
The MAC protocol can be very simple.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
To prevent the receiver from being overwhelmed by incoming data.

50. What is the primary reason for developing IPv6?
Is used by the server to resolve names.
A. application b. services
Router(config)# interface FastEthernet 0/1
It has expanded adressing capabilities.