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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
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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. 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
Application
In an improperly implemented redundant topology
Duplex mismatch
ARP and ICMP

2. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Congestion avoidance - Windowing and Buffering
It is used to prevent switching loops in networks with redundant switched routes.
100 meters
Information about a route should never be sent back in the direction from which the original update came.

3. 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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
In an improperly implemented redundant topology
Layer 3
Data link

4. 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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Source Port - Acknowledgment Number - and Window
VTP
Application

5. 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
The switch will forward the frame to a specific port
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

6. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Data link
It operates without collisions and It provides faster data transfer
Serial0/1 is down - line protocol is down
VTP will allow switches to share VLAN configuration information

7. What is the IEEE standard associated with Gigabit Ethernet?
The interfaces must be configured for NAT.
802.3ab and 802.3z
It will prevent segment 1's broadcasts from getting to segment 2.
Telnet and FTP

8. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Learning - Listening - and Forwarding
Network
Serial0/1 is down - line protocol is down
Hosts use a logical bus topology

9. 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.
STP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Application
Hosts use a logical bus topology

10. 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
Application
Show cdp neighbor detail
Port security

11. 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
Duplex mismatch
Transport
The sequence number in the TCP header.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

12. By default - which of the following factors determines the spanning-tree path cost?
It is the sum of the costs based on bandwidth
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.
HTTPS
The network layer

13. 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?
All switch and bridge ports are in either the forwarding or blocking state.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
CertK Switch(config)# ip default-gateway 192.168.1.115
Network

14. Which OSI layer header contains the address of a destination host that is on another network?
Switches increase the number of collision domains in the network.
Increased latency and Filtering of all frame errors
Network
The port is experiencing errors

15. 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
Duplex mismatch
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 Bridgeg ID and The bridge priority

16. 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
The network layer
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.
CertK Switch(config)# ip default-gateway 192.168.1.115
Duplex mismatch

17. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
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 is the sum of the costs based on bandwidth
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.

18. 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?
The sequence number in the TCP header.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Configure the switch so that it has lower priority than other switches in the network
HTTPS - SMTP - and TFTP

19. Which of the following are types of flow control?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Buffering - Cut-through - and Congestion avoidance
Show arp and Show interface
Transport

20. Which of the following are spanning tree port states?
802.1Q and ISL
Layer 4
Learning - Listening - and Forwarding
CertK Switch(config)# ip default-gateway 192.168.1.115

21. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
TCP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Learning - Listening - and Forwarding

22. Which of the following services use TCP?
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 system is malfunctioning.
SMTP FTP and HTTP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

23. 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?
An additional broadcast domain will be created.
HTTPS
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.
A broadcast address will never be the source address of a frame

24. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
An additional broadcast domain will be created.
A cross-over cable
Network
The switch will forward the frame to a specific port

25. 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?
Sequence number - Window size - and Acknowledgment number
Network
Congestion avoidance - Windowing and Buffering
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

26. Which of the following can lead to the contribution of LAN traffic congestion?
Congestion avoidance - Windowing and Buffering
It operates without collisions and It provides faster data transfer
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

27. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
This is an Ethernet port operating at half duplex
CertK Switch(config)# ip default-gateway 192.168.1.115
Data link
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

28. 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?
ARP and ICMP
It is used to prevent switching loops in networks with redundant switched routes.
Layer 4
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.

29. 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?
HTTPS
VTP
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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.

30. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
All switch and bridge ports are in either the forwarding or blocking state.
Port security
CertK Switch(config)# ip default-gateway 192.168.1.115

31. Which protocol uses TCP port 443 at layer 4?
Too many hosts in a broadcast domain - 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.
HTTPS
Fiber optic cable.

32. 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.
To prevent switching loops in networks with redundant switched paths.
The network layer
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

33. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
STP
SMTP - FTP - HTTP - and HTTPS
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 domain with too many hosts - Broadcast storms - and Low bandwidth

34. Which three of the protocols below belong to the application layer? (Select three answer choices)
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
To allow remote management of the switch.
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

35. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
To allow remote management of the switch.
STP
VLAN and Swtich
The network layer

36. 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
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.
Switches increase the number of collision domains in the network.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

37. With regard to Ethernet media access methods - which of the following are true?
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.
Fiber optic cable.
To prevent switching loops in networks with redundant switched paths.

38. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
CertK Switch(config)# ip default-gateway 192.168.1.115
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.
802.1Q and ISL
It is used to prevent switching loops in networks with redundant switched routes.

39. 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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40. Cisco is the leader in the router market space. What basic functions do their routers perform in a 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.
Path selections and Packet switching.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The network layer

41. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Decrease the window size.
Layer 3
An electrical pulse indicates that the collision has cleared.
Information about a route should never be sent back in the direction from which the original update came.

42. 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?
HTTPS - SMTP - and TFTP
The interfaces must be configured for NAT.
An additional broadcast domain will be created.
Duplex mismatch

43. What is the purpose of the spanning-tree algorithm in a switched LAN?
Network
Buffering - Cut-through - and Congestion avoidance
100 meters
To prevent switching loops in networks with redundant switched paths.

44. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
It is the sum of the costs based on bandwidth
The system is malfunctioning.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The Bridgeg ID and The bridge priority

45. 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?
The switch will forward the frame to a specific port
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
VLAN and Swtich

46. 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
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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.

47. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
The network layer
It is the sum of the costs based on 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.
802.1Q and ISL

48. 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?
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.
Serial0/1 is down - line protocol is down
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.

49. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Auto - On - and Desirable
Serial0/1 is down - line protocol is down
Layer 4

50. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Certkiller B > trace
The system is malfunctioning.
Auto - Desirable - and On
Data link

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