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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. 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?
It is used to prevent switching loops in networks with redundant switched routes.
Path selections and Packet switching.
100 meters
Show cdp neighbor detail

2. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Path selections and Packet switching.
Auto - Desirable - and On
Transport
TCP

3. 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
An additional broadcast domain will be created.
HTTPS
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

4. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
The interfaces must be configured for NAT.
Auto - Desirable - and On
Sequence number - Window size - and Acknowledgment number
Data link

5. 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
Fiber optic cable.
Network
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Configure the switch so that it has a lower priority than other switches in the network.

6. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
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.
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

7. 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?
Data link
The system is malfunctioning.
Application
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

8. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
A broadcast address will never be the source address of a frame
Switches increase the number of collision domains in the network.
The Bridgeg ID and The bridge priority
To prevent switching loops in networks with redundant switched paths.

9. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
VTP will allow switches to share VLAN configuration information
Source Port - Acknowledgment Number - and Window
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

10. Which two of the following values does STP take into consideration when it elects the root bridge?
Port security
Show cdp neighbor detail
The Bridgeg ID and The bridge priority
MAC Address and Bridge Priority

11. 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
Duplex mismatch
Buffering - Cut-through - and Congestion avoidance
Data link
Device Identifiers - Capabilities list - Platform

12. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Telnet and FTP
Show cdp neighbor detail
Layer 4
It is used to prevent switching loops in networks with redundant switched routes.

13. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
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.
The Bridgeg ID and The bridge priority
Auto - On - and Desirable

14. 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?
It will prevent segment 1's broadcasts from getting to segment 2.
This is an Ethernet port operating at half duplex
100 meters
A cross-over cable

15. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
VLAN and Swtich
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Layer 4

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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Physical Layer and Datalink Layer
Configure the switch so that it has lower priority than other switches in 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.

17. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
Decrease the window size.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
It is used to prevent switching loops in networks with redundant switched routes.

18. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
A hub and A repeater.
Learning - Listening - and Forwarding
A broadcast address will never be the source address of a frame
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

19. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Telnet and FTP
Duplex mismatch
A hub and A repeater.

20. 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?
Hosts use a logical bus topology
It operates without collisions and It provides faster data transfer
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.
An electrical pulse indicates that the collision has cleared.

21. Which three of the protocols below belong to the application layer? (Select three answer choices)
Switches increase the number of collision domains in the network.
An additional broadcast domain will be created.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
HTTPS - SMTP - and TFTP

22. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Network
HTTPS - SMTP - and TFTP
Learning - Listening - and Forwarding
Layer 3

23. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Transport
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
The sequence number in the TCP header.
HTTPS - SMTP - and TFTP

24. 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?
Application
VTP will allow switches to share VLAN configuration information
Transport
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

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?
MAC Address and Bridge Priority
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
Show arp and Show interface
Increased latency and Filtering of all frame errors

26. 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?
It is the sum of the costs based on bandwidth
The port is experiencing errors
Increased latency and Filtering of all frame errors
It operates without collisions and It provides faster data transfer

27. What is the IEEE standard associated with Gigabit Ethernet?
It operates without collisions and It provides faster data transfer
Application
VTP will allow switches to share VLAN configuration information
802.3ab and 802.3z

28. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Buffering - Cut-through - and Congestion avoidance
Data link
Serial0/1 is down - line protocol is down
Path selections and Packet switching.

29. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch 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
Switches increase the number of collision domains in the network.
Auto - On - and Desirable
VLAN and Swtich

30. 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
Duplex mismatch
Device Identifiers - Capabilities list - Platform
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.
The Bridgeg ID and The bridge priority

31. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Sequence number - Window size - and Acknowledgment number
Certkiller B > trace
The system is malfunctioning.
Physical Layer and Datalink Layer

32. 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?
Layer 4
The switch will forward the frame to a specific port
Port security
Sequence number - Window size - and Acknowledgment number

33. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Application
It will prevent segment 1's broadcasts from getting to segment 2.
TCP
Switches increase the number of collision domains in the network.

34. 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.
An electrical pulse indicates that the collision has cleared.
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

35. Which of the following devices can the Certkiller network administrator use to segment the LAN?
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.
Switches - Bridges - and Routers
Increased latency and Filtering of all frame errors
An additional broadcast domain will be created.

36. 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?
A hub and A repeater.
Source Port - Acknowledgment Number - and Window
Application
The system is malfunctioning.

37. 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?
This is an Ethernet port operating at half duplex
Network
The switch will forward the frame to a specific port
The sequence number in the TCP header.

38. 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
Decrease the window size.
Telnet and FTP
The network layer
SMTP - FTP - HTTP - and HTTPS

39. 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?
HTTPS
An additional broadcast domain will be created.
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.

40. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
Data link
To allow remote management of the switch.
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.

41. Why is full-duplex Ethernet superior to its single-duplex counterpart?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
It operates without collisions and It provides faster data transfer
Layer 4
Data link

42. Which of the following can lead to the contribution of LAN traffic congestion?
In an improperly implemented redundant topology
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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
This is an Ethernet port operating at half duplex

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.)
This is an Ethernet port operating at half duplex
VLAN and Swtich
A broadcast address will never be the source address of a frame
MAC Address and Bridge Priority

44. What is the purpose of the spanning-tree algorithm in a switched LAN?
STP
To prevent switching loops in networks with redundant switched paths.
This is an Ethernet port operating at half duplex
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

45. Which of the following are types of flow control?
The system is malfunctioning.
Buffering - Cut-through - and Congestion avoidance
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.
A broadcast address will never be the source address of a frame

46. Which of the following correctly describe steps in the OSI date encapsulation process?
Increased latency and Filtering of all frame errors
The Bridgeg ID and The bridge priority
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.
Congestion avoidance - Windowing and Buffering

47. 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?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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
CertK Switch(config)# ip default-gateway 192.168.1.115
Device Identifiers - Capabilities list - Platform

48. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
The network layer
Information about a route should never be sent back in the direction from which the original update came.
TCP
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.

49. What are two characteristics of 'store and forward' switching?
It will prevent segment 1's broadcasts from getting to segment 2.
Network
SMTP FTP and HTTP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

50. You need to perform some initial configuration tasks on a new Certkiller switch. What is the purpose of assigning an IP address to a switch?
Congestion avoidance - Windowing and Buffering
Buffering - Cut-through - and Congestion avoidance
To allow remote management of the switch.
Show cdp neighbor detail