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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. What is an automated service that matches resource names w/ required IP addresses?
It has expanded adressing capabilities.
Console interface
DNS
A default gateway (router).

2. What is the primary reason for developing IPv6?
A default gateway (router).
A. DNS b. SMTP c. POP
It has expanded adressing capabilities.
SSH

3. What is the purpose of resource records in DNS?
A. router b. firewall
Is used by the server to resolve names.
A. hot keys b. context-sensitive c. command syntax check
IP Protocol

4. 3 primary functions of the data link layer encapsulation
Identify processes or services that are communicating with end devices.
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Router
A. addressing b. error detection c. frame delimiting

5. What type of routing uses information that is manually entered into the routing table?
A. media sharing b. logical topology
A. larger address space b. data types and classes of service c. authentication and encryption
A. MTA b. SMTP
Static

6. Which portion of the network layer address does a router use to forward packets?
Minimal delays in data delivery.
Network portion
To enable a receiving host to forward the data to the appropriate application.
A. replace a switch w/ a router b. subnet the new networks

7. Why is flow control used for TCP data transfer?
Ctrl + Shift + 6
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
To prevent the receiver from being overwhelmed by incoming data.
A. application b. services

8. Group of hosts that have identical bit patterns in the high order bits of their addresses
A. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
Network portion
Network Layer Packet
Network

9. 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?
The address of the router that the host will use to 'get to the other side'.
A physical topology.
172.16.192.160
A. servers b. routers c. network printers

10. 3 factors that should be considered when implementing Layer 2 protocols
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
To facilitate the entry and exit of data on media.
Source and Destination IP address
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected

11. What is a component of a routing table entry?
Is a layer of specific encapsulation.
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
2046
Next-Hop Address

12. What is the primary purpose of ARP?
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. minimizing of collisions b. division into broadcast domains
Rollover cable
Resolve IPv4 addresses to MAC addresses.

13. What does the IEEE 802.2 standard represent in Ethernet technologies?
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
They must wait until the first hosts finish transfering the media.
TCP initializes the sequence numbers for the sessions.
Logical Link Control sublayer

14. Which combination of keys can be used to interrupt a ping or traceroute process?
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
It uses support from the lower layers to distinguish between connections to the service.
Ctrl + Shift + 6
A. netstat -r b. route PRINT

15. 3 statements about the role of routers in the network
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. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. servers b. routers c. network printers
Signal loss can be experienced.

16. What do the intermediary devices in the network do?
A. DNS b. SMTP c. POP
Ctrl + Shift + 6
It provides for the exchange of data over a common local media.
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows

17. What command can be used to determine if the router has experienced any input or output errors?
A. hot keys b. context-sensitive c. command syntax check
Show Interfaces
A. perform degradation b. security issues c. host identification
Network Layer Packet

18. If you have a small network w/ 3 computers...
A. next-hop b. metric/interface c. destination network address
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
It uses support from the lower layers to distinguish between connections to the service.
They must wait until the first hosts finish transfering the media.

19. During a TCP session - if packets arrive out of order - what will happen?
A. decentralized resources b. resource sharing w/o a dedicated server
Source and Destination IP address
Network address
The packets will be delivered and reassembled at destination.

20. What can be a problem that is reduced by adding end-to-end addressing?
Network
A. minimizing of collisions b. division into broadcast domains
It reduces unnecessary broadcasts.
IP is not properly installed

21. 3 functions of the upper data link sublayer in the OSI model
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Any device whose backoff timer expires first.
Time-to-live (TTL)
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

22. Which IP packet field will prevent endless loops?
To enable a receiving host to forward the data to the appropriate application.
It uses lasers as the light source.
Time-to-live (TTL)
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info

23. What can get you to an outside network?
Console interface
Show Interfaces
A default gateway (router).
Is used by the server to resolve names.

24. Which characteristics describe fiber optic cable?
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Host mobility
Source and Destination Ports

25. What are 2 features of User Diagram Protocol (UDP)?
TCP initializes the sequence numbers for the sessions.
RJ-45
The physical address is added.
A. low overhead b. connectionless

26. What type of network cable is used between a terminal and a console port?
A backbone cable.
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Rollover cable
Physical

27. When do changes take effect in a Cisco router?
Destination is not contacted before a packet is sent.
RJ-45
As the commands are entered.
Network address

28. An admin needs to keep contents private - which access method should he use?
Collisions can decrease network performance.
SSH
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
172.16.192.160

29. What is the primary purpose of Layer 4?
It uses support from the lower layers to distinguish between connections to the service.
Router(config)# interface FastEthernet 0/1
Identify processes or services that are communicating with end devices.
A. application b. presentation c. session d. transmision e. network f. data link g. physical

30. 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. purpose b. geographic location c. ownership
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. show startup-config b. show running-config
A. low overhead b. connectionless

31. What is the role of the OSI Application Layer?
They must wait until the first hosts finish transfering the media.
It provides interface between applications on either end of the network.
Time-to-live (TTL)
A. larger address space b. data types and classes of service c. authentication and encryption

32. What are key considering factors when grouping hosts into common networks?
A. servers b. routers c. network printers
It has expanded adressing capabilities.
A. purpose b. geographic location c. ownership
A. router b. firewall

33. What are 3 pieces of info about a route contained in a routing table?
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. next-hop b. metric/interface c. destination network address
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
SMB

34. To make a console connection from a comp to a Cisco router - what cable should be used?
Rollover cable
Is a layer of specific encapsulation.
A. show startup-config b. show running-config
A. minimizing of collisions b. division into broadcast domains

35. On a ethernet segment - why do hosts that experience a collision use a random delay before attempting to transmit?
Router
A random delay helps prevent the stations from experiencing another collision during transmission.
Next-Hop Address
Network portion

36. 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. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
80 (HTTP)
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
It provides interface between applications on either end of the network.

37. What describes the purpose of default route?
A. goodput b. throughput c. bandwidth
Network Layer Packet
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
It does not support encryption.

38. What is a mechanism used by TCP to provide flow control as segments travel from source to destination?
Window Size
A. automatic detection and negotiating of MDI/MDIX operation of the port b. enabling the mechanism to electrically swap the transmit and receive pairs
Is used by the server to resolve names.
Console interface

39. An admin needs a media that can run up to 100m in legth. Which type of media would be best?
Wireless
Destination Network Address
It does not support encryption.
UTP

40. 2 common methods for settin a UTP ethernet port to MDI or MDIX?
A. identifies the communicating applications b. identifies multiple conversations between the hosts
Source Port
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. next-hop b. metric/interface c. destination network address

41. What do end devices do?
A. copper UTP b. optical fiber
It uses lasers as the light source.
255.255.255.0
Originate data flow.

42. Which type of cable is most often associated w/ fiber-optic cable?
A. DB 60 b. Winchester 15-pin c. smart serial
A backbone cable.
A. hot keys b. context-sensitive c. command syntax check
Console

43. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
Supports error detection.
Hub
No collisions will occur on this link.
FTP

44. At which layer of the TCP/IP model does ethernet operate?
Network Access
FTP
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
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

45. What are 2 email components used to forward mail between servers?
Static
Rollover cable
It uses lasers as the light source.
A. MTA b. SMTP

46. What is the purpose of the preamble in an ethernet frame?
Fiber
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Static
A. purpose b. geographic location c. ownership

47. 3 features that allow TCP to realibly and accurately track the transmission of data
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery
A. Cat5 UTP b. Cat6 UTP
It uses support from the lower layers to distinguish between connections to the service.
A. flow control b. session establishment c. numbering and sequencing

48. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
Destination Network Address
A. Cat5 UTP b. Cat6 UTP
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Hosts return to listen-before-transmit mode.

49. How does the application layer on a server process multiple client requests for services?
A physical topology.
It uses support from the lower layers to distinguish between connections to the service.
255.255.255.0
A. physical layer b. DLL layer

50. What networking devices are recommended to be assigned static IP addresses?
Twisting of the cables
A. servers b. routers c. network printers
Binary ANDing
A. non-deterministic b. less overhead c. collisions exist