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 common characteristics associated w/ dynamic routing protocols?
Network
A. provide routers w/ up-to-date routing tables b. consume bandwidth to exchange route info
Rollover cable
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

2. Which combination of keys can be used to interrupt a ping or traceroute process?
Ctrl + Shift + 6
A. show startup-config b. show running-config
Network portion
Network Layer

3. Group of hosts that have identical bit patterns in the high order bits of their addresses
A. goodput b. throughput c. bandwidth
The magnetic field around the adjacent pairs of wire.
A. it has centralized administration b. security is easier to enforce
Network

4. When a collision occurs using CSMA/CD - how do hosts w/ data to transmit respond after the backoff period expires?
A. low overhead b. connectionless
Flash
Hosts return to listen-before-transmit mode.
Hub

5. What would be the response displayed after pinging 127.0.0.1 and there is a 0 packet transmission?
Host A
IP is not properly installed
IP Protocol
SMB

6. 3 features that allow TCP to realibly and accurately track the transmission of data
A. performance degradation b. security issues c. host identification
A. flow control b. session establishment c. numbering and sequencing
8
Collisions can decrease network performance.

7. 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?
To prevent the receiver from being overwhelmed by incoming data.
Host A
A. purpose b. geographic location c. ownership
A. decentralized resources b. resource sharing w/o a dedicated server

8. What application layer protocol is used to support file transfers between client and server?
Collisions can decrease network performance.
FTP
It has expanded adressing capabilities.
IP Protocol

9. How does the application layer on a server process multiple client requests for services?
Router(config)# interface FastEthernet 0/1
Time-to-live (TTL)
It uses support from the lower layers to distinguish between connections to the service.
Signal loss can be experienced.

10. What kind of problems are caused by excessive broadcast traffic on network segments?
Network portion
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
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
RJ-45

11. 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?
FTP
Originate data flow.
When connecting a host to a switch.
172.16.192.160

12. What can be a problem that is reduced by adding end-to-end addressing?
It provides interface between applications on either end of the network.
A. media sharing b. logical topology
Identify processes or services that are communicating with end devices.
It reduces unnecessary broadcasts.

13. If there is a graphic representation of a company network wiring and equipment - What is this called?
A physical topology.
Network Access
Console
Router(config)# interface FastEthernet 0/1

14. There are too many broadcasts on switches - what can be done?
Network Access
No collisions will occur on this link.
A physical topology.
A. replace a switch w/ a router b. subnet the new networks

15. What are 2 email components used to forward mail between servers?
Network Layer Packet
A. identifies the communicating applications b. identifies multiple conversations between the hosts
A. MTA b. SMTP
OTDR

16. If the router says: 'Switch-East4#' What identifies the CLI mode represented?
MAC
A physical topology.
Signal loss can be experienced.
A. enable mode b. priviledge executive mode

17. What command is used to change the default name to 'Costas'?
Router(config)# hostname Costas
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
Destination Network Address
A. goodput b. throughput c. bandwidth

18. Which layer supplies services and allows user interface?
A. HTTP b. HTTPS
A. goodput b. throughput c. bandwidth
Create signals that represent the bits in each frame for the media.
Application Layer

19. After an ethernet collision - which device has priority to transmit data?
A. DNS b. SMTP c. POP
A. application b. services
A. it has centralized administration b. security is easier to enforce
Any device whose backoff timer expires first.

20. What are 3 common problems w/ large networks?
Binary ANDing
Console
A. perform degradation b. security issues c. host identification
It reduces unnecessary broadcasts.

21. What makes fiber preferable to copper for interconnecting buildings?
A default gateway (router).
A. 48 binary bits in length b. physical addresses c. represented in a hexadecimal format
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

22. What are 2 commands used to view a host routing table?
A. non-deterministic b. less overhead c. collisions exist
Host A
DNS
A. netstat -r b. route PRINT

23. What command can be used to determine if the router has experienced any input or output errors?
Fiber
No collisions will occur on this link.
Show Interfaces
A. replace a switch w/ a router b. subnet the new networks

24. What 2 type of cables would most commonly be used for new runs?
To enable a receiving host to forward the data to the appropriate application.
Router(config)# interface FastEthernet 0/1
A. Cat5 UTP b. Cat6 UTP
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

25. What are the advantages of using a client-server model?
A physical topology.
Switch
Destination is not contacted before a packet is sent.
A. it has centralized administration b. security is easier to enforce

26. 3 measures of data transfer
A physical topology.
A. goodput b. throughput c. bandwidth
Network address
A. servers b. routers c. network printers

27. 2 characteristics of clients in data networks
A. they initiate data exchanges b. they may upload data to servers
Host mobility
No collisions will occur on this link.
Network address

28. When do changes take effect in a Cisco router?
IP Protocol
As the commands are entered.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet

29. If you have a full-duplex operational network - what can happen?
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
A. router b. firewall
TCP initializes the sequence numbers for the sessions.
No collisions will occur on this link.

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?
80 (HTTP)
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
A. netstat -r b. route PRINT
A. show startup-config b. show running-config

31. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
TCP initializes the sequence numbers for the sessions.
A. MTA b. SMTP
A. enable mode b. priviledge executive mode
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

32. What is the proper order of the OSI Layers?
A. application b. presentation c. session d. transmision e. network f. data link g. physical
255.255.255.0
IP Protocol
FTP

33. What is an automated service that matches resource names w/ required IP addresses?
Hosts return to listen-before-transmit mode.
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
DNS
Destination is not contacted before a packet is sent.

34. What is a disadvantage of Telnet?
255.255.255.224
Window Size
Collisions can decrease network performance.
It does not support encryption.

35. 3 statements about the role of routers in the network
A. show startup-config b. show running-config
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
Host A

36. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
A. DNS b. SMTP c. POP
Originate data flow.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
Fiber

37. 2 characteristics of peer-2-peer
A. decentralized resources b. resource sharing w/o a dedicated server
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
80 (HTTP)
It has expanded adressing capabilities.

38. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Collisions can decrease network performance.
Binary ANDing
Network Layer Packet
A. hot keys b. context-sensitive c. command syntax check

39. 3 features of IPv6
A. larger address space b. data types and classes of service c. authentication and encryption
When connecting a host to a switch.
Source and Destination Ports
Twisting of the cables

40. When destination network is not in the routing table - What are 2 actions the router might take?
Static
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
Create signals that represent the bits in each frame for the media.
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry

41. What is PDU?
Is a layer of specific encapsulation.
Twisting of the cables
Minimal delays in data delivery.
FTP

42. What is the primary purpose of ARP?
FTP
Resolve IPv4 addresses to MAC addresses.
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
Next-Hop Address

43. Given IP 172.16.134.64 and S/M 255.255.255.224 - this IP is an...?
To enable a receiving host to forward the data to the appropriate application.
80 (HTTP)
Network address
Resolve IPv4 addresses to MAC addresses.

44. What can you identify when you examine the Network Layer header?
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
A. they initiate data exchanges b. they may upload data to servers
The destination host address.
Network

45. Why is flow control used for TCP data transfer?
Fiber
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
The host can communicate w/ other hosts in the local network but is unable to communicate w/ hosts on the other networks.
To prevent the receiver from being overwhelmed by incoming data.

46. What do the intermediary devices in the network do?
A. determine pathways for data b. retrieve and retransmit data signals c. manage data flows
The packets will be delivered and reassembled at destination.
Console
Network address

47. What do end devices do?
A default gateway (router).
Originate data flow.
A. netstat -r b. route PRINT
No collisions will occur on this link.

48. Which IP packet field will prevent endless loops?
Time-to-live (TTL)
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. located in a single geographical area b. administered by a single organization c. each end is connected to a Telecommunication Service Provider (TSP)
A backbone cable.

49. Which OSI model layer is responsible for regulating the flow of information from source to destination - reliably and accurately?
A. the router will discard the packet b. the router will send a time exceeded message to the source host
Transport
The destination host address.
A physical topology.

50. 3 primary functions of the data link layer encapsulation
A. flow control b. session establishment c. numbering and sequencing
A. addressing b. error detection c. frame delimiting
Binary ANDing
A. non-deterministic b. less overhead c. collisions exist