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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
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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. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Layer 4
It provides a mechanism for the receiver to control the transmission speed - You have just installed a new web server on the Certkiller network. You are required to ensure that the web server is accessible from the Internet. The network uses private
An additional broadcast domain will be created.
Network

2. Which OSI layer header contains the address of a destination host that is on another network?
100 meters
To allow remote management of the switch.
Certkiller B > trace
Network

3. A Certkiller Ethernet switch receives a unicast frame with a destination MAC that IS listed in the switch table. What will this switch do with the frame?
HTTPS - SMTP - and TFTP
The switch will forward the frame to a specific port
Network
Information about a route should never be sent back in the direction from which the original update came.

4. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
The Bridgeg ID and The bridge priority
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Fiber optic cable.
Switches - Bridges - and Routers

5. A Certkiller switch is configured with all ports assigned to VLAN 2. In addition - all ports are configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on this switch?
An additional broadcast domain will be created.
All switch and bridge ports are in either the forwarding or blocking state.
Decrease the window size.
The network layer

6. As the Certkiller network administrator - you are required to have a firmunderstanding of the OSI model. Why does the data communication industry use the layered OSI reference model?
It is the sum of the costs based on bandwidth
A hub and A repeater.
VTP will allow switches to share VLAN configuration information
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting

7. The CK network administrator needs to determine what LAN devices to install on the CK network. What are two advantages of using Layer 2 Ethernet switches over hubs?
It is used to prevent switching loops in networks with redundant switched routes.
This is an Ethernet port operating at half duplex
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Configure the switch so that it has a lower priority than other switches in the network.

8. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Auto - On - and Desirable
Switches increase the number of collision domains in the network.
It provides a mechanism for the receiver to control the transmission speed - You have just installed a new web server on the Certkiller network. You are required to ensure that the web server is accessible from the Internet. The network uses private
Path selections and Packet switching.

9. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
In an improperly implemented redundant topology
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.
To prevent switching loops in networks with redundant switched paths.
Switches increase the number of collision domains in the network.

10. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Auto - Desirable - and On
The network layer
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

11. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
802.3ab and 802.3z
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
HTTPS - SMTP - and TFTP

12. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Configure the switch so that it has a lower priority than other switches in the network.
Learning - Listening - and Forwarding
Buffering - Cut-through - and Congestion avoidance

13. On a half-duplex Ethernet LAN - two hosts attempt to send data simultaneously - resulting in a collision. Following this collision - what will the hosts do?
Application
An electrical pulse indicates that the collision has cleared.
Layer 4
Decrease the window size.

14. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Hosts use a logical bus topology
This is an Ethernet port operating at half duplex
A broadcast address will never be the source address of a frame
HTTPS - SMTP - and TFTP

15. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Increased latency and Filtering of all frame errors
Decrease the window size.
The sequence number in the TCP header.
Serial0/1 is down - line protocol is down

16. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
STP
A hub and A repeater.
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting
Information about a route should never be sent back in the direction from which the original update came.

17. Although TCP segments are similar to UDP segments - TCP packets contains some additional fields. Which of the following are found in a TCP header - but not in a UDP header?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Source Port - Acknowledgment Number - and Window
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Sequence number - Window size - and Acknowledgment number

18. While troubleshooting a connectivity problem - the Certkiller network administrator notices that a port status LED on a Cisco Catalyst Series switch is alternating between green and amber. Which condition could this indicate?
The port is experiencing errors
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to
Configure the switch so that it has a lower priority than other switches in the network.
It will prevent segment 1's broadcasts from getting to segment 2.

19. The Certkiller network administrator wants to use a router named CK1 to segment the local network. What are some of the advantages of using CK1 to segment the network? (Choose two)
CertK Switch(config)# ip default-gateway 192.168.1.115
Layer 4
Application
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

20. Which two of the following values does STP take into consideration when it elects the root bridge?
Auto - On - and Desirable
The Bridgeg ID and The bridge priority
Layer 4
An electrical pulse indicates that the collision has cleared.

21. You want to upgrade the Certkiller LAN so that all ports operate in full duplex mode. Which statement is true about full-duplex Ethernet when comparing to half-duplex Ethernet?
To allow remote management of the switch.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
It provides a mechanism for the receiver to control the transmission speed - You have just installed a new web server on the Certkiller network. You are required to ensure that the web server is accessible from the Internet. The network uses private
The switch must be reachable through a port connected to its management VLAN. and The switch must be configured with an IP address - subnet mask - and default gateway.

22. CDP is running between two CK devices. What information is supplied by CDP?
The port is experiencing errors
Device Identifiers - Capabilities list - Platform
A cross-over cable
Buffering - Cut-through - and Congestion avoidance

23. Certkiller users have noticed extremely slow network performance - intermittent connectivity - and connection losses. After entering the 'show interfaces' command - you notice that the Ethernet interface is configured as 100 Mbps full-duplex and that
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
This is an Ethernet port operating at half duplex
Duplex mismatch
Switches - Bridges - and Routers

24. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Auto - Desirable - and On
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.
Physical Layer and Datalink Layer
Configure the switch so that it has a lower priority than other switches in the network.

25. A network administrator wants to control which user hosts can access the network based on their MAC address. What will prevent workstations with unauthorized MAC addresses from connecting to the network through a switch?
Port security
To obtain the IP address of a connected device in order to telnet to the device - To verify Layer 2 connectivity between two devices when Layer 3 fails.
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
The system is malfunctioning.

26. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Transport
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
It operates without collisions and It provides faster data transfer
802.3ab and 802.3z

27. You are the administrator of the Certkiller LAN and you have been reviewing error logs of networking devices and notice a large number of errors associated with several MAC addresses. You suspect that some of the errors are being generated by the rou
Layer 4
HTTPS
Show arp and Show interface
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

28. when files are transferred between a host and an FTP server - the data is divided into smaller pieces of transmission. As these pieces arrive at the destination host they must be reassembled to reconstruct the original file. What provides for the rea
Application
The sequence number in the TCP header.
Learning - Listening - and Forwarding
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

29. As a Certkiller trainee you are required to set the default gateway on a Cisco switch to the IP address of 192.168.1.115. Which IOS command should you use?
Physical Layer and Datalink Layer
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
CertK Switch(config)# ip default-gateway 192.168.1.115

30. Which of the following are true of Ethernet technology?
The Bridgeg ID and The bridge priority
Hosts use a logical bus topology
Port security
VTP will allow switches to share VLAN configuration information

31. A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?
Decrease the window size.
This is an Ethernet port operating at half duplex
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
It is the sum of the costs based on bandwidth

32. As a network Admin - you will need to decide on the appropriate network devices to use. Which of the following correctly describes the roles of the devices in a WAN?
All switch and bridge ports are in either the forwarding or blocking state.
A broadcast address will never be the source address of a frame
Decrease the window size.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

33. Which of the following correctly describe the various functions and virtues of a router?
Network
Port security
Packet switching - Packet filtering and Internetwork communication.
Data link

34. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
VLAN and Swtich
Buffering - Cut-through - and Congestion avoidance
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
In a CSMA/CD collision domain - stations must wait until the media is not in use before transmitting. and After a collision - all stations run a random backoff algorithm. When the backoff delay period has expired - all stations have equal priority to

35. While troubleshooting a connectivity problem on the network - you issure the ping command from your PC command prompt - but the output shows 'request times out' At which OSI layer is this problem associated with?
MAC Address and Bridge Priority
It operates without collisions and It provides faster data transfer
The network layer
STP

36. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
This is an Ethernet port operating at half duplex
SMTP FTP and HTTP
STP
It is the sum of the costs based on bandwidth

37. You unsuccessfully try to ping the Internet from the PC host on the LAN. During the troubleshooting process - you enter the 'show ip nat translations' command but the output is blank. What is the most likely cause of the problem?
Switches increase the number of collision domains in the network.
Path selections and Packet switching.
The switch that will share the VLAN information must be in the VTP Server mode. -The switches must be in the same VTP domain. - The switches must be configured to use the same STP version. and The switches must be connected over VLAN trunks.
The interfaces must be configured for NAT.

38. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
CertK Switch(config)# ip default-gateway 192.168.1.115
Port security
Learning - Listening - and Forwarding
TCP

39. Which of the following services use TCP?
SMTP FTP and HTTP
Switches usually have a higher number of ports then most bridges - Both bridges and switches forward Layer 2 broadcasts and Both bridges and switches make forwarding decisions based on Layer 2 addresses.
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
VLAN and Swtich

40. In a switched LAN network - What is the Spanning-Tree algorithm used for?
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting
Certkiller B > trace
Data link
It is used to prevent switching loops in networks with redundant switched routes.

41. The Certkiller corporate LAN consists of one large flat network. You decide to segment this LAN into two separate networks with a router. What will be the affect of this change?

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42. What kind of cable should be used to establish a trunked line between two Catalyst switches?
MAC Address and Bridge Priority
A cross-over cable
An additional broadcast domain will be created.
Show arp and Show interface

43. Assuming you build networks to exact specifications - What is the recommended maximum length a 10BaseT cable can be before it has to be segmented or repeated?
100 meters
It encourages industry standardization by defining what functions occur at each layer of the model and It divides the network communication process into smaller and simpler components; thus aiding component development - design and troubleshooting
Show cdp neighbor detail
The Bridgeg ID and The bridge priority

44. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Data link
SMTP FTP and HTTP
The network layer
The system is malfunctioning.

45. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
To prevent switching loops in networks with redundant switched paths.
VLAN and Swtich

46. With regard to Ethernet media access methods - which of the following are true?
It provides a mechanism for the receiver to control the transmission speed - You have just installed a new web server on the Certkiller network. You are required to ensure that the web server is accessible from the Internet. The network uses private
Switches - Bridges - and Routers
A device listens and waits until the media is not busy before transmitting. and All devices on an Ethernet segment see data that passes on the network medium.
An additional broadcast domain will be created.

47. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Show cdp neighbor detail
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
Auto - On - and Desirable

48. Which of the protocols below use TCP at the transport layer?
Switches - Bridges - and Routers
It provides a mechanism for the receiver to control the transmission speed - You have just installed a new web server on the Certkiller network. You are required to ensure that the web server is accessible from the Internet. The network uses private
Auto - On - and Desirable
SMTP - FTP - HTTP - and HTTPS

49. The Certkiller network administrator needs to a switch named CK1 to become the root bridge for a redundant path switched network. What can be done to ensure that CK1 will always assume the role as the root bridge?
The host network card and the switch port must be capable of operating in full-duplex mode. - There are no collisions in full-duplex mode. and A dedicated switch port is required for each full-duplex node.
An electrical pulse indicates that the collision has cleared.
Auto - On - and Desirable
Configure the switch so that it has lower priority than other switches in the network

50. You need to perform some initial configuration tasks on a new Certkiller switch. What is the purpose of assigning an IP address to a switch?
Data link
To allow remote management of the switch.
VTP
The Bridgeg ID and The bridge priority

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