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. At which layer of the TCP/IP model does ethernet operate?
A. copper UTP b. optical fiber
IP is not properly installed
Network Access
A. hot keys b. context-sensitive c. command syntax check

2. What are 2 commands used to view a host routing table?
MAC
To enable a receiving host to forward the data to the appropriate application.
A. netstat -r b. route PRINT
A. application b. presentation c. session d. transmision e. network f. data link g. physical

3. If there is a graphic representation of a company network wiring and equipment - What is this called?
A. show startup-config b. show running-config
A physical topology.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. the router will discard the packet b. the router will send a time exceeded message to the source host

4. What is the primary purpose of ARP?
The address of the router that the host will use to 'get to the other side'.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Resolve IPv4 addresses to MAC addresses.
A. non-deterministic b. less overhead c. collisions exist

5. After a browser makes a request to a web server in the standard port - what will be the port number in the TCP header?
It reduces unnecessary broadcasts.
80 (HTTP)
Router(config)# interface FastEthernet 0/1
Network

6. What is the purpose of resource records in DNS?
A. netstat -r b. route PRINT
Is used by the server to resolve names.
The destination host 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

7. What type of network cable is used between a terminal and a console port?
Supports error detection.
Network Media Control
Source and Destination IP address
Rollover cable

8. 3 statements about the role of routers in the network
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
172.16.192.160
Application Layer

9. What is the primary reason for developing IPv6?
The MAC protocol can be very simple.
It has expanded adressing capabilities.
Fiber
OTDR

10. Important characteristic of UDP
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Signal loss can be experienced.
Minimal delays in data delivery.
Collisions can decrease network performance.

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. not affected by EMI of RFI b. most expensive type of LAN cabling
A. router b. firewall
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Hub

12. In business LANs - which connector is used w/ twisted-pair networking cable?
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
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. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
RJ-45

13. What can you identify when you examine the Network Layer header?
A. next-hop b. metric/interface c. destination network address
Network address
Wireless
The destination host address.

14. During a TCP session - if packets arrive out of order - what will happen?
Static
Hosts return to listen-before-transmit mode.
The packets will be delivered and reassembled at destination.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

15. What is the name of the application layer protocol used for file sharing on Microsoft Networks?
SMB
A. Cat5 UTP b. Cat6 UTP
Host mobility
A. show startup-config b. show running-config

16. Intermediary devices used to implement security between networks
A. they initiate data exchanges b. they may upload data to servers
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
DNS
A. router b. firewall

17. What is dinamically selected by the source host when forwarding data?
A. define structure of layer specific PDUs b. outline the functions necessary for communication between layers c. require layer dependent capsulations
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
To facilitate the entry and exit of data on media.
Source Port

18. What is an automated service that matches resource names w/ required IP addresses?
A. servers b. routers c. network printers
A. physical layer b. DLL layer
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
DNS

19. What is the proper order of the OSI Layers?
The magnetic field around the adjacent pairs of wire.
They must wait until the first hosts finish transfering the media.
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Fiber

20. What is the purpose of the TCP/IP Network Application Layer?
Network Media Control
Destination Network Address
Hosts return to listen-before-transmit mode.
Next-Hop Address

21. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
It does not support encryption.
Network Layer Packet
Network address
TCP initializes the sequence numbers for the sessions.

22. What connectors are commonly associated w/ Cisco's V.35 serial cables?
80 (HTTP)
A. non-deterministic b. less overhead c. collisions exist
Ctrl + Shift + 6
A. DB 60 b. Winchester 15-pin c. smart serial

23. What information is added during encapsulation at OSI Layer 3?
As the commands are entered.
Source and Destination IP address
It has expanded adressing capabilities.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

24. A company is planning to subnet a network w/ 27 hosts. What would be the subnet mask used for this?
Twisting of the cables
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
255.255.255.224
Console

25. 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. 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. netstat -r b. route PRINT
Destination Network Address

26. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
DNS
Rollover cable
A. they initiate data exchanges b. they may upload data to servers
Network address

27. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Collisions can decrease network performance.
Window Size
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
172.16.192.160

28. What can get you to an outside network?
It reduces unnecessary broadcasts.
Router(config)# hostname Costas
A. servers b. routers c. network printers
A default gateway (router).

29. What application layer protocol is used to support file transfers between client and server?
Hub
Application Layer
UTP
FTP

30. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
Binary ANDing
A random delay helps prevent the stations from experiencing another collision during transmission.
A. copper UTP b. optical fiber
A. performance degradation b. security issues c. host identification

31. When do changes take effect in a Cisco router?
As the commands are entered.
A. non-deterministic b. less overhead c. collisions exist
Network address
Collisions can decrease network performance.

32. Default Gateway is incorrect on the host - What is the impact on the communications?
A. hot keys b. context-sensitive c. command syntax check
Router(config)# hostname Costas
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
Application Layer

33. What is a benefit of a WAN?
A. DNS b. SMTP c. POP
SSH
Host mobility
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other

34. What are 3 pieces of info about a route contained in a routing table?
A. next-hop b. metric/interface c. destination network address
Network portion
A. DB 60 b. Winchester 15-pin c. smart serial
They must wait until the first hosts finish transfering the media.

35. What is the purpose of a default gateway?
Logical Link Control sublayer
A. the router will discard the packet b. the router will send a time exceeded message to the source host
To facilitate the entry and exit of data on media.
Identify the device that allows local network computers to communicate w/ devices in other networks.

36. Why are port numbers included in the TCP header of a segment?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. purpose b. geographic location c. ownership
To enable a receiving host to forward the data to the appropriate application.
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

37. Which 2 options represent Layer 4 addressing?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
To facilitate the entry and exit of data on media.
A. Physical b. Data Link
Host mobility

38. Which characteristics describe fiber optic cable?
Signal loss can be experienced.
A. enable mode b. priviledge executive mode
A. not affected by EMI of RFI b. most expensive type of LAN cabling
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

39. What networking devices are recommended to be assigned static IP addresses?
It has expanded adressing capabilities.
A. performance degradation b. security issues c. host identification
A. servers b. routers c. network printers
A. addressing b. error detection c. frame delimiting

40. Which combination of keys can be used to interrupt a ping or traceroute process?
Resolve IPv4 addresses to MAC addresses.
Network Access
Ctrl + Shift + 6
Identify the device that allows local network computers to communicate w/ devices in other networks.

41. What is a characteristic of a logical point-to-point topology?
The MAC protocol can be very simple.
A. router b. firewall
Host A
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

42. What is PDU?
Is a layer of specific encapsulation.
A. larger address space b. data types and classes of service c. authentication and encryption
Network portion
A physical topology.

43. If you want to connect 4 hosts in a home network - what would be the best deviced to be used?
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Switch
Ctrl + Shift + 6
To prevent the receiver from being overwhelmed by incoming data.

44. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
A backbone cable.
Router(config)# hostname Costas
Flash
A random delay helps prevent the stations from experiencing another collision during transmission.

45. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. HTTP b. HTTPS
A. show startup-config b. show running-config
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. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs

46. Which IP packet field will prevent endless loops?
Is a layer of specific encapsulation.
Time-to-live (TTL)
SSH
As the commands are entered.

47. 3 measures of data transfer
A. application b. presentation c. session d. transmision e. network f. data link g. physical
Time-to-live (TTL)
Router(config)# hostname Costas
A. goodput b. throughput c. bandwidth

48. statements of IP adressing
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
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. 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. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long

49. What is a protocol that provides connectionless network layer services?
IP Protocol
A. Cat5 UTP b. Cat6 UTP
Logical Link Control sublayer
A. application b. presentation c. session d. transmision e. network f. data link g. physical

50. 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?
8
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. larger address space b. data types and classes of service c. authentication and encryption
Network Media Control