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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. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
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 operates without collisions and It provides faster data transfer
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 increase the number of collision domains in the network.

2. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Application
802.1Q and ISL
The interfaces must be configured for NAT.
Network

3. 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.
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.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
HTTPS - SMTP - and TFTP

4. 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?
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.
Certkiller B > trace
Physical Layer and Datalink Layer
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

5. 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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6. 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?
The port is experiencing errors
Packet switching - Packet filtering and Internetwork communication.
Show cdp neighbor detail
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.

7. 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
It is used to prevent switching loops in networks with redundant switched routes.
Switches increase the number of collision domains in the network.
Duplex mismatch
It will prevent segment 1's broadcasts from getting to segment 2.

8. With regard to Ethernet media access methods - which of the following are true?
Serial0/1 is down - line protocol is down
VLAN and Swtich
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.
Show arp and Show interface

9. 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
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
Information about a route should never be sent back in the direction from which the original update came.
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.
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

10. 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?
Certkiller B > trace
The port is experiencing errors
ARP and ICMP
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

11. 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
Network
Sequence number - Window size - and Acknowledgment number
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

12. 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
Telnet and FTP
It is the sum of the costs based on bandwidth
To prevent switching loops in networks with redundant switched paths.
The sequence number in the TCP header.

13. 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?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Decrease the window size.
Serial0/1 is down - line protocol is down
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

14. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
Encapsulations PPP and authentication CHAP
SMTP - FTP - HTTP - and HTTPS
Show arp and Show interface

15. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
Source Port - Acknowledgment Number - and Window
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.
This is an Ethernet port operating at half duplex

16. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
Sequence number - Window size - and Acknowledgment number
The network layer
Buffering - Cut-through - and Congestion avoidance

17. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Application
Certkiller B > trace
A broadcast address will never be the source address of a frame
Application

18. Which protocol uses TCP port 443 at layer 4?
HTTPS
The port is experiencing errors
Show cdp neighbor detail
All switch and bridge ports are in either the forwarding or blocking state.

19. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
It will prevent segment 1's broadcasts from getting to segment 2.
All switch and bridge ports are in either the forwarding or blocking state.

20. What are two characteristics of 'store and forward' switching?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
802.3ab and 802.3z
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
802.1Q and ISL

21. 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?
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.
Data link
Learning - Listening - and Forwarding
Configure the switch so that it has lower priority than other switches in the network

22. 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
ARP and ICMP
Encapsulations PPP and authentication CHAP
Packet switching - Packet filtering and Internetwork communication.

23. 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)
An electrical pulse indicates that the collision has cleared.
Physical Layer and Datalink Layer
The Bridgeg ID and The bridge priority
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

24. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
An additional broadcast domain will be created.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
All switch and bridge ports are in either the forwarding or blocking state.

25. 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
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.
Certkiller B > trace
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Data link

26. 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
Switches - Bridges - and Routers
It is used to prevent switching loops in networks with redundant switched routes.
A hub and A repeater.

27. 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
Application
The sequence number in the TCP header.
Learning - Listening - and Forwarding
Fiber optic cable.

28. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Duplex mismatch
Data link
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.
All switch and bridge ports are in either the forwarding or blocking state.

29. 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.
Serial0/1 is down - line protocol is down
Physical Layer and Datalink Layer
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.

30. 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?
Configure the switch so that it has a lower priority than other switches in the network.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Show arp and Show interface
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.

31. 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
The port is experiencing errors
Show cdp neighbor detail
100 meters

32. Which of the following services use TCP?
Layer 4
SMTP - FTP - HTTP - and HTTPS
This is an Ethernet port operating at half duplex
SMTP FTP and HTTP

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?
VTP
Physical Layer and Datalink Layer
Congestion avoidance - Windowing and Buffering
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

34. CDP is running between two CK devices. What information is supplied by CDP?
Auto - Desirable - and On
Device Identifiers - Capabilities list - Platform
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
100 meters

35. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Packet switching - Packet filtering and Internetwork communication.
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
Fiber optic cable.

36. 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
The system is malfunctioning.
Application
Physical Layer and Datalink Layer

37. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Information about a route should never be sent back in the direction from which the original update came.
Network
Source Port - Acknowledgment Number - and Window
Layer 3

38. 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.)
The port is experiencing errors
Data link
MAC Address and Bridge Priority
It is used to prevent switching loops in networks with redundant switched routes.

39. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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 is used to prevent switching loops in networks with redundant switched routes.
Switches - Bridges - and Routers

40. 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
It is used to prevent switching loops in networks with redundant switched routes.
Application
STP
VLAN and Swtich

41. 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
Application
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

42. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
VTP
In an improperly implemented redundant topology
Congestion avoidance - Windowing and Buffering
Configure the switch so that it has lower priority than other switches in the network

43. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Configure the switch so that it has a lower priority than other switches in the network.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Auto - On - and Desirable
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

44. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The system is malfunctioning.
It will prevent segment 1's broadcasts from getting to segment 2.
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.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

45. 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?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Layer 3
Buffering - Cut-through - and Congestion avoidance
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

46. 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?
Sequence number - Window size - and Acknowledgment number
A hub and A repeater.
Hosts use a logical bus topology
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

47. Which OSI layer header contains the address of a destination host that is on another network?
VTP will allow switches to share VLAN configuration information
Network
VTP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

48. 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
Network
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The switch will forward the frame to a specific port
Port security

49. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller 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
All switch and bridge ports are in either the forwarding or blocking state.
Application
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

50. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Layer 3
Duplex mismatch
An electrical pulse indicates that the collision has cleared.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.