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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. Which OSI layer is responsible for binary transmission - cable specification - and physical aspects of network communication?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
Physical
Collisions can decrease network performance.

2. What type of routing uses information that is manually entered into the routing table?
Static
Switch
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. they initiate data exchanges b. they may upload data to servers

3. What is the primary function of encapsulating packets into frames?
Source and Destination Ports
Network Layer
To facilitate the entry and exit of data on media.
A. addressing b. error detection c. frame delimiting

4. What device can check for faults - integrity and performance of media?
Rollover cable
As the commands are entered.
OTDR
Transport

5. If you have an Ethernet Frame w/ a Header - Data and a Trailer. It is a...?
Network Layer Packet
A. DB 60 b. Winchester 15-pin c. smart serial
172.16.192.160
The magnetic field around the adjacent pairs of wire.

6. Intermediary devices used to implement security between networks
The packets will be delivered and reassembled at destination.
A. not affected by EMI of RFI b. most expensive type of LAN cabling
Fiber
A. router b. firewall

7. What kind of problems are caused by excessive broadcast traffic on network segments?
255.255.255.0
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
The packets will be delivered and reassembled at destination.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

8. Which characteristics describe fiber optic cable?
Network Access
A. goodput b. throughput c. bandwidth
Router
A. not affected by EMI of RFI b. most expensive type of LAN cabling

9. What layer encapsulates segments into packets?
A. DNS b. SMTP c. POP
Network Layer
255.255.255.224
It uses lasers as the light source.

10. What connectors are commonly associated w/ Cisco's V.35 serial cables?
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. netstat -r b. route PRINT
A. DB 60 b. Winchester 15-pin c. smart serial
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

11. What networking devices are recommended to be assigned static IP addresses?
When connecting a host to a switch.
A. minimizing of collisions b. division into broadcast domains
A. servers b. routers c. network printers
Physical

12. 2 characteristics of peer-2-peer
A. MTA b. SMTP
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
IP is not properly installed
A. decentralized resources b. resource sharing w/o a dedicated server

13. What 2 type of cables would most commonly be used for new runs?
A. Cat5 UTP b. Cat6 UTP
Source and Destination IP address
Hosts return to listen-before-transmit mode.
8

14. 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?
Network Access
172.16.192.160
A. consumes network bandwidth b. increases overhead on network c. interrupts other host functions
A. show startup-config b. show running-config

15. What is a characteristic of a logical point-to-point topology?
Collisions can decrease network performance.
The MAC protocol can be very simple.
SMB
RJ-45

16. 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?
Network address
172.16.192.160
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

17. How many bits make up an IPv4 address?
OTDR
32 bits
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A backbone cable.

18. With TCP/IP encapsulation - which range of port numbers identifies all well known applications?
255.255.255.224
0 to 1023
A. goodput b. throughput c. bandwidth
A. Physical b. Data Link

19. What is the primary funcion of the trailer in the Data Link Layer encapsulation?
A default gateway (router).
Router
Physical
Supports error detection.

20. How many host addresses can be assigned to a subnetwork when using the 130.68.0.0 network address w/ a subnet mask of 255.255.248.0?
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
2046
A. the router will discard the packet b. the router will send a time exceeded message to the source host
A. copper UTP b. optical fiber

21. What are key considering factors when grouping hosts into common networks?
Resolve IPv4 addresses to MAC addresses.
Hosts return to listen-before-transmit mode.
Twisting of the cables
A. purpose b. geographic location c. ownership

22. Which sublayer of the DLL prepares a signal to be transmitted at the physical layer?
Destination Network Address
MAC
A. computers are allowed to transmit data only when they posses a token b. electronic tokens are passes sequentially to each other
A. greater distances per cable run b. limited susceptibility to EMI/RFI c. greater bandwidth potential

23. What command is used to change the default name to 'Costas'?
To prevent the receiver from being overwhelmed by incoming data.
Router(config)# hostname Costas
The physical address is added.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

24. What process routers use to determine the subnet network address w/ an IP address and a subnet mask?
IP is not properly installed
Binary ANDing
A. router b. firewall
A. HTTP b. HTTPS

25. What is the role of MTA in handling email?
Destination Network Address
Console interface
Console
A. receives emails from clients MUA b. uses SMTP to route email between servers c. passes email to MDA for final delivery

26. What correctly describes a MAC address?
A. copied into RAM during system startup b. contains a 3 byte OUI c. is 6 bytes long
It is used for timing synchronization w/ alternating patterns of 1s and 0s.
A. purpose b. geographic location c. ownership
Destination is not contacted before a packet is sent.

27. What is PDU?
Is a layer of specific encapsulation.
UTP
Wireless
A. it has centralized administration b. security is easier to enforce

28. Which portion of the network layer address does a router use to forward packets?
A random delay helps prevent the stations from experiencing another collision during transmission.
Network portion
255.255.255.224
A. larger address space b. data types and classes of service c. authentication and encryption

29. 3 facts about the network portion of an IPv4 address
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
Application Layer
MAC
Host mobility

30. Why are port numbers included in the TCP header of a segment?
The MAC protocol can be very simple.
The packets will be delivered and reassembled at destination.
Console interface
To enable a receiving host to forward the data to the appropriate application.

31. What are 2 email components used to forward mail between servers?
A. MTA b. SMTP
The destination host address.
The magnetic field around the adjacent pairs of wire.
Binary ANDing

32. If there are potential electrical and/or electromagnetic hazards - what type of media is recommended for backbone cabling?
Fiber
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment
Physical
They must wait until the first hosts finish transfering the media.

33. What do end devices do?
Resolve IPv4 addresses to MAC addresses.
Console
A default gateway (router).
Originate data flow.

34. Which device is used to create or divide broadcast domains?
255.255.255.224
Router
IP Protocol
IP is not properly installed

35. If there is a graphic representation of a company network wiring and equipment - What is this called?
A random delay helps prevent the stations from experiencing another collision during transmission.
A physical topology.
Hub
A. addressing b. error detection c. frame delimiting

36. What is a benefit of a WAN?
Binary ANDing
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
Host mobility
A. they initiate data exchanges b. they may upload data to servers

37. 3 measures of data transfer
A. goodput b. throughput c. bandwidth
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
A. replace a switch w/ a router b. subnet the new networks

38. What is the role of the OSI Application Layer?
A. addressing b. error detection c. frame delimiting
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
It provides interface between applications on either end of the network.
Flash

39. What can you identify when you examine the Network Layer header?
Transport
The destination host address.
MAC
Rollover cable

40. What characteristic of an UTP helps reduce interference?
Time-to-live (TTL)
Twisting of the cables
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
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

41. When is a straight-through cable used in a network?
It has expanded adressing capabilities.
A. enable mode b. priviledge executive mode
Host mobility
When connecting a host to a switch.

42. What are the advantages of using a client-server model?
A. performance degradation b. security issues c. host identification
A. router discards the packet b. router forwards the packet out the interface indicated in the route entry
A. they segment broadcast domains b. they interconnect different network technologies c. each router interface requires a separate network or subnet
A. it has centralized administration b. security is easier to enforce

43. What type of network cable is used between a terminal and a console port?
Rollover cable
Source and Destination Ports
A random delay helps prevent the stations from experiencing another collision during transmission.
Network portion

44. What is the purpose of the preamble in an ethernet frame?
To enable a receiving host to forward the data to the appropriate application.
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. 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
It is used for timing synchronization w/ alternating patterns of 1s and 0s.

45. Which type of cable is most often associated w/ fiber-optic cable?
A backbone cable.
Collisions can decrease network performance.
The physical address is added.
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1

46. Host1 is in the process of setting up a TCP session with Host2. Host1 sent a SYN message to begin establishment - what happens next?
Next-Hop Address
Host2 sends a segment to Host1 with: ACK flag = 1 SYN flag = 1
A. is identical for all hosts in a broadcast domain b. varies in length c. is used to forward packet
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

47. To make a console connection from a comp to a Cisco router - what cable should be used?
Supports error detection.
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.
Rollover cable
A. identifies network layer protocol b. makes the connection w/ the upper layers c. insulates network layer protocols from changes in physical equipment

48. 3 factors that should be considered when implementing Layer 2 protocols
32 bits
UTP
A. geographic scope of the network b. physical layer implementation c. number of hosts to be interconnected
Window Size

49. What describes the purpose of default route?
Window Size
A. media sharing b. logical topology
Host A
Host uses a default route to transfer data to host outside the local network when no other route to the destination exists.

50. What is a characteristic of a single-mode fiber-optic cable?
MAC
A. they initiate data exchanges b. they may upload data to servers
It uses lasers as the light source.
A. purpose b. geographic location c. ownership