Test your basic knowledge |

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. 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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2. Which fields are included in the TCP header?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Source Port - Acknowledgment Number - and Window
VTP
This is an Ethernet port operating at half duplex

3. 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?
Packet switching - Packet filtering and Internetwork communication.
Port security
100 meters
ARP and ICMP

4. 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?
All switch and bridge ports are in either the forwarding or blocking state.
Configure the switch so that it has lower priority than other switches in the network
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Data link

5. 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?
802.3ab and 802.3z
100 meters
Configure the switch so that it has a lower priority than other switches in the network.
Auto - Desirable - and On

6. CDP is running between two CK devices. What information is supplied by CDP?
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.
Application
HTTPS
Device Identifiers - Capabilities list - Platform

7. 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 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
Port security
A cross-over cable
Decrease the window size.

8. 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.)
MAC Address and Bridge Priority
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Hosts use a logical bus topology
Learning - Listening - and Forwarding

9. 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
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 sequence number in the TCP header.
The system is malfunctioning.
Information about a route should never be sent back in the direction from which the original update came.

10. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Increased latency and Filtering of all frame errors
In an improperly implemented redundant topology
Decrease the window size.
It operates without collisions and It provides faster data transfer

11. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
Show cdp neighbor detail
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
In an improperly implemented redundant topology

12. What is the IEEE standard associated with Gigabit Ethernet?
The network layer
Hosts use a logical bus topology
802.3ab and 802.3z
Switches increase the number of collision domains in the network.

13. 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?
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 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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Increased latency and Filtering of all frame errors

14. With regard to Ethernet media access methods - which of the following are true?
HTTPS - SMTP - and TFTP
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.
HTTPS
802.3ab and 802.3z

15. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Show cdp neighbor detail
MAC Address and Bridge Priority

16. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Auto - On - and Desirable
Physical Layer and Datalink Layer
VTP will allow switches to share VLAN configuration information

17. 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?
Network
Layer 3
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
A cross-over cable

18. 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
Source Port - Acknowledgment Number - and Window
Show arp and Show interface
802.1Q and ISL
Application

19. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
SMTP - FTP - HTTP - and HTTPS
Data link
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

20. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
A cross-over cable
Configure the switch so that it has a lower priority than other switches 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
Certkiller B > trace

21. What are two characteristics of 'store and forward' switching?
Device Identifiers - Capabilities list - Platform
Layer 3
Auto - Desirable - and On
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

22. 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 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
It will prevent segment 1's broadcasts from getting to segment 2.

23. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
A hub and A repeater.
The Bridgeg ID and The bridge priority
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.

24. 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?
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.
Port security
Application
CertK Switch(config)# ip default-gateway 192.168.1.115

25. Which of the following are types of flow control?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
TCP
Buffering - Cut-through - and Congestion avoidance
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

26. 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
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
802.3ab and 802.3z
Auto - Desirable - and On

27. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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 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.

28. 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.
VTP will allow switches to share VLAN configuration information
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.
HTTPS

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?
The port is experiencing errors
Network
VTP will allow switches to share VLAN configuration information
Network

30. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
A broadcast address will never be the source address of a frame
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 receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Layer 4

31. 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?
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.
The switch will forward the frame to a specific port
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

32. Which three of the protocols below belong to the application layer? (Select three answer choices)
VTP will allow switches to share VLAN configuration information
Learning - Listening - and Forwarding
The sequence number in the TCP header.
HTTPS - SMTP - and TFTP

33. 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?
802.3ab and 802.3z
Device Identifiers - Capabilities list - Platform
Port security
VTP

34. 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?
The network layer
Auto - Desirable - and On
The port is experiencing errors
Congestion avoidance - Windowing and Buffering

35. What kind of cable should be used to establish a trunked line between two Catalyst switches?
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
Decrease the window size.
To allow remote management of the switch.
A cross-over cable

36. 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
The Bridgeg ID and The bridge priority
Application
Serial0/1 is down - line protocol is down

37. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
The port is experiencing errors
Data link
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Information about a route should never be sent back in the direction from which the original update came.

38. 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?
All switch and bridge ports are in either the forwarding or blocking state.
HTTPS
Congestion avoidance - Windowing and Buffering
Certkiller B > trace

39. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Network
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Physical Layer and Datalink Layer

40. 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
A cross-over cable
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
It is used to prevent switching loops in networks with redundant switched routes.

41. 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
Auto - Desirable - and On
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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.

42. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
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.
In an improperly implemented redundant topology
Show cdp neighbor detail

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.
ARP and ICMP
To allow remote management of the switch.
Application
802.1Q and ISL

44. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Encapsulations PPP and authentication CHAP
It is the sum of the costs based on bandwidth
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
A broadcast address will never be the source address of a frame

45. The LAN needs are expanding at the CK corporate office - which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the CK network. Which of the following are layer 1 devices that you can use?
To allow remote management of the switch.
A hub and A repeater.
The port is experiencing errors
A cross-over cable

46. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
VTP
The system is malfunctioning.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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. Which of the following correctly describe the various functions and virtues of a router?
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
CertK Switch(config)# ip default-gateway 192.168.1.115
Port security
Packet switching - Packet filtering and Internetwork communication.

48. Which of the following services use TCP?
Sequence number - Window size - and Acknowledgment number
Layer 3
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
SMTP FTP and HTTP

49. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Increased latency and Filtering of all frame errors
The system is malfunctioning.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
802.3ab and 802.3z

50. Two buildings on the London campus of a CK corporation must be connected to use Ethernet with a bandwidth of at least 100 Mbps. CK is concerned about possible problems from voltage potential differences between the two buldings. Which media type shou
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Telnet and FTP
Fiber optic cable.
Port security