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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. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
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.
Layer 3
Configure the switch so that it has a lower priority than other switches in the network.
Increased latency and Filtering of all frame errors

2. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
Application
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Layer 4

3. Both the switches and hubs are being utilized within the CK network. Which of the following is true regarding the use of switches and hubs for the network connectivity in this network?
Switches increase the number of collision domains in the network.
Layer 4
All switch and bridge ports are in either the forwarding or blocking state.
Sequence number - Window size - and Acknowledgment number

4. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Buffering - Cut-through - and Congestion avoidance
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Congestion avoidance - Windowing and Buffering
ARP and ICMP

5. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Source Port - Acknowledgment Number - and Window
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
To prevent switching loops in networks with redundant switched paths.
It will prevent segment 1's broadcasts from getting to segment 2.

6. CDP is running between two CK devices. What information is supplied by CDP?
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.
ARP and ICMP
Device Identifiers - Capabilities list - Platform
Buffering - Cut-through - and Congestion avoidance

7. 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 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.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
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.
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

8. Which of the following can lead to the contribution of LAN traffic congestion?
Learning - Listening - and Forwarding
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Configure the switch so that it has a lower priority than other switches in the network.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

9. 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?
The network layer
The sequence number in the TCP header.
An additional broadcast domain will be created.
Switches increase the number of collision domains in the network.

10. 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
CertK Switch(config)# ip default-gateway 192.168.1.115
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.
Learning - Listening - and Forwarding

11. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Configure the switch so that it has lower priority than other switches in the network
It operates without collisions and It provides faster data transfer
Data link
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.

12. 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.
Congestion avoidance - Windowing and Buffering
Port security
To allow remote management of the switch.
Application

13. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
TCP
Layer 4
CertK Switch(config)# ip default-gateway 192.168.1.115
A broadcast address will never be the source address of a frame

14. 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.
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
Serial0/1 is down - line protocol is down
Layer 3

15. 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?
Telnet and FTP
A hub and A repeater.
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.
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

16. 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
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
Sequence number - Window size - and Acknowledgment number
This is an Ethernet port operating at half duplex

17. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Decrease the window size.
It is the sum of the costs based on bandwidth
VLAN and Swtich

18. 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?
Auto - On - and Desirable
Network
VTP will allow switches to share VLAN configuration information
ARP and ICMP

19. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
Configure the switch so that it has a lower priority than other switches in the network.
The interfaces must be configured for NAT.
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.

20. 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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21. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
Port security
The Bridgeg ID and The bridge priority
SMTP - FTP - HTTP - and HTTPS

22. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Increased latency and Filtering of all frame errors
A cross-over cable
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

23. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
Switches increase the number of collision domains in the network.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
TCP

24. 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
Network
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.
It operates without collisions and It provides faster data transfer
The sequence number in the TCP header.

25. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
It operates without collisions and It provides faster data transfer
Transport
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.

26. 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
Source Port - Acknowledgment Number - and Window
Serial0/1 is down - line protocol is down
Fiber optic cable.
Auto - On - and Desirable

27. 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 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.
TCP
Path selections and Packet switching.

28. 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?
A broadcast address will never be the source address of a frame
VTP
To prevent switching loops in networks with redundant switched paths.
Configure the switch so that it has a lower priority than other switches in the network.

29. By default - which of the following factors determines the spanning-tree path cost?
HTTPS - SMTP - and TFTP
It is the sum of the costs based on bandwidth
Serial0/1 is down - line protocol is down
STP

30. 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
Layer 4
Telnet and FTP
Network

31. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
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.
Fiber optic cable.
Show cdp neighbor detail
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

32. 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?
Increased latency and Filtering of all frame errors
100 meters
Auto - On - and Desirable
A cross-over cable

33. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
Show cdp neighbor detail
Application
Port security

34. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Port security
HTTPS
Path selections and Packet switching.
To allow remote management of the switch.

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?
Data link
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Application
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

36. Which OSI layer header contains the address of a destination host that is on another network?
Source Port - Acknowledgment Number - and Window
Physical Layer and Datalink Layer
Fiber optic cable.
Network

37. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
To prevent switching loops in networks with redundant switched paths.
802.1Q and ISL
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.
Source Port - Acknowledgment Number - and Window

38. 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?
VTP will allow switches to share VLAN configuration information
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Certkiller B > trace
Network

39. What is the purpose of the spanning-tree algorithm in a switched LAN?
802.3ab and 802.3z
The network layer
A cross-over cable
To prevent switching loops in networks with redundant switched paths.

40. 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?
All switch and bridge ports are in either the forwarding or blocking state.
Certkiller B > trace
It is used to prevent switching loops in networks with redundant switched routes.
Fiber optic cable.

41. 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?
An electrical pulse indicates that the collision has cleared.
Application
MAC Address and Bridge Priority
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.

42. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Auto - On - and Desirable
SMTP - FTP - HTTP - and HTTPS
Switches increase the number of collision domains in the network.

43. 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.)
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Decrease the window size.
ARP and ICMP
MAC Address and Bridge Priority

44. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Network
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.
Data link
Application

45. With regard to Ethernet media access methods - which of the following are true?
The Bridgeg ID and The bridge priority
Data link
Buffering - Cut-through - and Congestion avoidance
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.

46. Which of the protocols below use TCP at the transport layer?
Learning - Listening - and Forwarding
A cross-over cable
SMTP - FTP - HTTP - and HTTPS
To prevent switching loops in networks with redundant switched paths.

47. 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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
802.1Q and ISL
Hosts use a logical bus topology

48. Which protocol uses TCP port 443 at layer 4?
SMTP - FTP - HTTP - and HTTPS
Physical Layer and Datalink Layer
HTTPS
Show arp and Show interface

49. What are two characteristics of 'store and forward' switching?
CertK Switch(config)# ip default-gateway 192.168.1.115
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
It is used to prevent switching loops in networks with redundant switched routes.

50. 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?
Configure the switch so that it has a lower priority than other switches in the network.
The network layer
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.
Show cdp neighbor detail