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CCNA Hard

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. 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?
It is the sum of the costs based on bandwidth
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
An additional broadcast domain will be created.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

2. 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?
Show cdp neighbor detail
The sequence number in the TCP header.
Layer 4
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

3. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
A hub and A repeater.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
CertK Switch(config)# ip default-gateway 192.168.1.115

4. 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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5. 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
Path selections and Packet switching.
The system is malfunctioning.
Layer 3
Show arp and Show interface

6. 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?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The network layer
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Sequence number - Window size - and Acknowledgment number

7. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
A cross-over cable
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

8. 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
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
Duplex mismatch

9. Network equipment supporting the use of flow control mechanisms has been recently installed in the CK network. What is the purpose of flow control in a data 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
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Application
CertK Switch(config)# ip default-gateway 192.168.1.115

10. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Certkiller B > trace
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
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Serial0/1 is down - line protocol is down

11. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Information about a route should never be sent back in the direction from which the original update came.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
100 meters
It will prevent segment 1's broadcasts from getting to segment 2.

12. 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
100 meters
802.1Q and ISL
Device Identifiers - Capabilities list - Platform

13. As a CCNA candidate - you will be expected to know the OSI model very well. Which of the following are associated with the application layer (layer 7) of the OSI model?
The interfaces must be configured for NAT.
Telnet and FTP
Switches increase the number of collision domains in the network.
Switches - Bridges - and Routers

14. What is the purpose of the spanning-tree algorithm in a switched LAN?
Duplex mismatch
To prevent switching loops in networks with redundant switched paths.
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
The interfaces must be configured for NAT.

15. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
STP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Show arp and Show interface
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.

16. A new switch is installed in the Certkiller network. This switch is to be configured so that VLAN information will be automatically distributed to all the other Cisco Catalyst switches in the network. Which of the conditions below have to be met in o
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.
Show arp and Show interface
VTP will allow switches to share VLAN configuration information
Transport

17. The corporate head office of Certkiller has a teleconferencing system that uses VOIP (voice over IP) technology. This system uses UDP as the transport for the data transmissions. If these UDP datagrams arrive at their destination out of sequence - wh
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

18. 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?
Hosts use a logical bus topology
100 meters
The interfaces must be configured for NAT.
CertK Switch(config)# ip default-gateway 192.168.1.115

19. Which of the protocols below use TCP at the transport layer?
Buffering - Cut-through - and Congestion avoidance
SMTP - FTP - HTTP - and HTTPS
Duplex mismatch
Switches increase the number of collision domains in the network.

20. What is the IEEE standard associated with Gigabit Ethernet?
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.
Packet switching - Packet filtering and Internetwork communication.
Show arp and Show interface
802.3ab and 802.3z

21. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
All switch and bridge ports are in either the forwarding or blocking state.
Auto - On - and Desirable
VTP

22. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Switches increase the number of collision domains in the network.
Telnet and FTP
Encapsulations PPP and authentication CHAP

23. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Hosts use a logical bus topology
Auto - Desirable - and On
It operates without collisions and It provides faster data transfer
Configure the switch so that it has a lower priority than other switches in the network.

24. An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location?
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.
Encapsulations PPP and authentication CHAP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The network layer

25. You are logged into a router and wish to view the layer 3 information about your neighboring Cisco routers. What IOS command gives layer 3 information for of the directly connected router interfaces?
Show cdp neighbor detail
All switch and bridge ports are in either the forwarding or blocking state.
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
Learning - Listening - and Forwarding

26. Which of the following correctly describe steps in the OSI date encapsulation process?
Show arp and Show interface
Application
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
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

27. Certkiller is installing IP phones in a new office. The phones and office computers connect to the same device. To ensure maximum throughout for the phone data sessions - the company needs to make sure that the phone traffic is on a different network
SMTP - FTP - HTTP - and HTTPS
VLAN and Swtich
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
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.

28. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Serial0/1 is down - line protocol is down
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
To allow remote management of the switch.
In an improperly implemented redundant topology

29. While troubleshooting a network connectivity problem - a Certkiller technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However - when the ping command is issued from the works
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The network layer
Information about a route should never be sent back in the direction from which the original update came.
Switches increase the number of collision domains in the network.

30. You want to influence the root bridge selection within the Certkiller LAN. Which two values are used by spanning tree protocol to elect a root bridge? (Choose two.)
100 meters
802.3ab and 802.3z
MAC Address and Bridge Priority
Decrease the window size.

31. 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?
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
Telnet and FTP
Layer 4
Configure the switch so that it has lower priority than other switches in the network

32. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
SMTP FTP and HTTP
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
A broadcast address will never be the source address of a frame
Packet switching - Packet filtering and Internetwork communication.

33. You have set up an Internet based FTP server - where people can upload and download files. In terms of the OSI model - What is the highest layer used during the FTP sessions.
802.1Q and ISL
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.
Switches - Bridges - and Routers
Application

34. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
VTP
The Bridgeg ID and The bridge priority
TCP
Hosts use a logical bus topology

35. While troubleshooting an issue in the Certkiller LAN you notice that a network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement - What is known about the network interface port?
Configure the switch so that it has a lower priority than other switches in the network.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
VTP
This is an Ethernet port operating at half duplex

36. A Certkiller technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the sh
HTTPS - SMTP - and TFTP
Physical Layer and Datalink Layer
Data link
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

37. You need to describe the various types of flow control to your co-workers. Which of the following are types of flow control that can be used in a network?
Device Identifiers - Capabilities list - Platform
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
Congestion avoidance - Windowing and Buffering
Certkiller B > trace

38. 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?
Decrease the window size.
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.
The switch will forward the frame to a specific port
Learning - Listening - and Forwarding

39. A host computer has been correctly configured with a static IP address - but the default gateway is incorrectly set. Which layer of the OSI model will be first effected by this configuration error?
The network layer
Layer 3
Path selections and Packet switching.
Configure the switch so that it has a lower priority than other switches in the network.

40. The Certkiller LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?
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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Buffering - Cut-through - and Congestion avoidance
It is the sum of the costs based on bandwidth

41. 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)
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Data link
802.3ab and 802.3z
To allow remote management of the switch.

42. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
It will prevent segment 1's broadcasts from getting to segment 2.
Network
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.
TCP

43. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Information about a route should never be sent back in the direction from which the original update came.
It is the sum of the costs based on bandwidth
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.
It is used to prevent switching loops in networks with redundant switched routes.

44. What are two characteristics of 'store and forward' switching?
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.
VTP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

45. With regard to Ethernet media access methods - which of the following are true?
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.
A jam signal informs all devices that a collision occurred. - The devices that are involved in the collision stops transmitting for a short time. and The collision invokes a random back-off algorithm.
Switches increase the number of collision domains in the network.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

46. Which of the following correctly describe the various functions and virtues of a router?
Data link
SMTP FTP and HTTP
Packet switching - Packet filtering and Internetwork communication.
The switch will forward the frame to a specific port

47. You need to configure two Certkiller switches to exchange VLAN information. Which protocol provides a method of sharing VLAN configuration information between these two switches?
Path selections and Packet switching.
VTP
This is an Ethernet port operating at half duplex
The transport layer divides a data stream into segments and adds reliability and flow control information. Packets are created when the network layer adds Layer 3 addresses and control information to a segment.

48. As a CCNA candidate - you must know the various layers of the OSI model. At which layers of the OSI model do Wide Area Networks operate in?
Physical Layer and Datalink Layer
Duplex mismatch
The switch will forward the frame to a specific port
Layer 4

49. Both bridges are switches are being used throughout the CK LAN. Which of the following statements are true regarding bridges and switches in this network?
Network
Packet switching - Packet filtering and Internetwork communication.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.

50. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
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.
Serial0/1 is down - line protocol is down
Auto - On - and Desirable
Physical Layer and Datalink Layer