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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. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Data link
STP
Layer 4
It is used to prevent switching loops in networks with redundant switched routes.

2. Which of the following are spanning tree port states?
Auto - On - and Desirable
Learning - Listening - and Forwarding
802.1Q and ISL
It is used to prevent switching loops in networks with redundant switched routes.

3. 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
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.
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.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

4. 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?
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
Data link
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

5. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
Configure the switch so that it has lower priority than other switches in the network
CertK Switch(config)# ip default-gateway 192.168.1.115
The sequence number in the TCP header.

6. 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?
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.
HTTPS - SMTP - and TFTP
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.
It is used to prevent switching loops in networks with redundant switched routes.

7. 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?
Switches increase the number of collision domains in the network.
HTTPS
STP
The switch will forward the frame to a specific port

8. Which two of the following values does STP take into consideration when it elects the root bridge?
ARP and ICMP
SMTP - FTP - HTTP - and HTTPS
An additional broadcast domain will be created.
The Bridgeg ID and The bridge priority

9. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
The network layer
Serial0/1 is down - line protocol is down
It will prevent segment 1's broadcasts from getting to segment 2.
Show arp and Show interface

10. 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?
The switch will forward the frame to a specific port
HTTPS
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The interfaces must be configured for NAT.

11. Which IOS user EXEC command will allow a network technician to determine which router in the path to an unreachable network host should be examined more closely for the cause of the network failure?
Telnet and FTP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Certkiller B > trace
Show cdp neighbor detail

12. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Switches increase the number of collision domains in the network.
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 allow remote management of the switch.

13. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
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.
Encapsulations PPP and authentication CHAP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
VTP will allow switches to share VLAN configuration information

14. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Data link
This is an Ethernet port operating at half duplex
Auto - On - and Desirable
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

15. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Configure the switch so that it has lower priority than other switches in the network
Packet switching - Packet filtering and Internetwork communication.
VTP will allow switches to share VLAN configuration information
CertK Switch(config)# ip default-gateway 192.168.1.115

16. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Switches increase the number of collision domains in the network.
SMTP - FTP - HTTP - and HTTPS
Decrease the window size.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

17. 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
The switch will forward the frame to a specific port
An electrical pulse indicates that the collision has cleared.
MAC Address and Bridge Priority

18. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
MAC Address and Bridge Priority
In an improperly implemented redundant topology
Data link
A hub and A repeater.

19. With regard to Ethernet media access methods - which of the following are true?
802.1Q and ISL
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.
Buffering - Cut-through - and Congestion avoidance
The system is malfunctioning.

20. Some of the older Certkiller switches store the entire frame before forwarding it to the destination. What are two effects on network performance of configuring a switch to do this?
In an improperly implemented redundant topology
The Bridgeg ID and The bridge priority
Increased latency and Filtering of all frame errors
802.3ab and 802.3z

21. What is the IEEE standard associated with Gigabit Ethernet?
Data link
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
802.3ab and 802.3z
Switches - Bridges - and Routers

22. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller 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
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
The switch will forward the frame to a specific port
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.

23. 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?
Source Port - Acknowledgment Number - and Window
An electrical pulse indicates that the collision has cleared.
CertK Switch(config)# ip default-gateway 192.168.1.115
MAC Address and Bridge Priority

24. 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?
Buffering - Cut-through - and Congestion avoidance
It will prevent segment 1's broadcasts from getting to segment 2.
Port security
Hosts use a logical bus topology

25. 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?
In an improperly implemented redundant topology
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
SMTP FTP and HTTP
Layer 4

26. Which of the following correctly describe steps in the OSI date encapsulation process?
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.
SMTP FTP and HTTP
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.
Data link

27. A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch assumes the role of the Root Bridge?
All switch and bridge ports are in either the forwarding or blocking state.
HTTPS
The switch will forward the frame to a specific port
Configure the switch so that it has a lower priority than other switches in the network.

28. 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?
Telnet and FTP
STP
A cross-over cable
SMTP FTP and HTTP

29. 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?
Transport
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.
Configure the switch so that it has lower priority than other switches in the network
The port is experiencing errors

30. 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)
Auto - Desirable - and On
Configure the switch so that it has lower priority than other switches in the network
Certkiller B > trace
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

31. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
Encapsulations PPP and authentication CHAP
The Bridgeg ID and The bridge priority
Show arp and Show interface

32. 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?
VLAN and Swtich
VTP
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 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.

33. You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operations?
Switches increase the number of collision domains in the network.
To prevent switching loops in networks with redundant switched paths.
Application
An electrical pulse indicates that the collision has cleared.

34. 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.)
802.3ab and 802.3z
MAC Address and Bridge Priority
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.
The system is malfunctioning.

35. 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?
Layer 4
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Certkiller B > trace
Learning - Listening - and Forwarding

36. Which of the following can lead to the contribution of LAN traffic congestion?
A cross-over cable
Auto - On - and Desirable
Application
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

37. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Network
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
Path selections and Packet switching.

38. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
To prevent switching loops in networks with redundant switched paths.
Information about a route should never be sent back in the direction from which the original update came.
Layer 3
In an improperly implemented redundant topology

39. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
802.3ab and 802.3z
Network
It is used to prevent switching loops in networks with redundant switched routes.
Sequence number - Window size - and Acknowledgment number

40. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
Show cdp neighbor detail
STP
To allow remote management of the switch.

41. 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
The network layer
100 meters
TCP
Duplex mismatch

42. By default - which of the following factors determines the spanning-tree path cost?
Path selections and Packet switching.
The network layer
It is the sum of the costs based on bandwidth
HTTPS

43. 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.
Application
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Port security
An additional broadcast domain will be created.

44. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
SMTP FTP and HTTP
STP
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

45. Which of the following correctly describe the various functions and virtues of a router?
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
The network layer
VTP will allow switches to share VLAN configuration information
Packet switching - Packet filtering and Internetwork communication.

46. The Certkiller network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?
The port is experiencing errors
ARP and ICMP
A broadcast address will never be the source address of a frame
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.

47. 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
Show arp and Show interface
Transport
100 meters
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

48. Which OSI layer header contains the address of a destination host that is on another network?
Network
The Bridgeg ID and The bridge priority
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.

49. 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?
It is used to prevent switching loops in networks with redundant switched routes.
Congestion avoidance - Windowing and Buffering
Application
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

50. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Physical Layer and Datalink Layer
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.
Device Identifiers - Capabilities list - Platform
Switches increase the number of collision domains in the network.