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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Auto - Desirable - and On
Certkiller B > trace
The switch will forward the frame to a specific port
It is used to prevent switching loops in networks with redundant switched routes.

2. 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.
The sequence number in the TCP header.
It is the sum of the costs based on bandwidth
Network

3. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Show cdp neighbor detail
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.

4. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
In an improperly implemented redundant topology
A broadcast address will never be the source address of a frame

5. 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.
ARP and ICMP
It is the sum of the costs based on bandwidth
The network layer

6. 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?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Application
To allow remote management of the switch.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

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
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.
Serial0/1 is down - line protocol is down
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.
Duplex mismatch

8. 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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
TCP
A hub and A repeater.
VTP will allow switches to share VLAN configuration information

9. 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?
Learning - Listening - and Forwarding
VTP will allow switches to share VLAN configuration information
Certkiller B > trace
To allow remote management of the switch.

10. CDP is running between two CK devices. What information is supplied by CDP?
Layer 4
Device Identifiers - Capabilities list - Platform
ARP and ICMP
Certkiller B > trace

11. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
100 meters
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
VTP will allow switches to share VLAN configuration information
CertK Switch(config)# ip default-gateway 192.168.1.115

12. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
Congestion avoidance - Windowing and Buffering
Auto - Desirable - and On
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

13. Which of the following correctly describe steps in the OSI date encapsulation process?
The network layer
An additional broadcast domain will be created.
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.

14. Which of the following can lead to the contribution of LAN traffic congestion?
Switches increase the number of collision domains in the network.
The Bridgeg ID and The bridge priority
Encapsulations PPP and authentication CHAP
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

15. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
802.1Q and ISL
Switches - Bridges - and Routers
An electrical pulse indicates that the collision has cleared.

16. 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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Source Port - Acknowledgment Number - and Window
An additional broadcast domain will be created.
A cross-over cable

17. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
802.1Q and ISL
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Duplex mismatch
Telnet and FTP

18. Which of the following services use TCP?
SMTP FTP and HTTP
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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.
Data link

19. With regard to Ethernet media access methods - which of the following are true?
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
Layer 4
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.

20. By default - which of the following factors determines the spanning-tree path cost?
It is the sum of the costs based on bandwidth
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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.
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

21. Which protocol uses TCP port 443 at layer 4?
Show cdp neighbor detail
Auto - On - and Desirable
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
HTTPS

22. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.
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
Layer 4

23. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Switches - Bridges - and Routers
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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Congestion avoidance - Windowing and Buffering

24. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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.
Layer 4
Duplex mismatch

25. What are two characteristics of 'store and forward' switching?
VTP
Learning - Listening - and Forwarding
802.1Q and ISL
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

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
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.
Transport

27. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
To prevent switching loops in networks with redundant switched paths.
Layer 4
SMTP - FTP - HTTP - and HTTPS
All switch and bridge ports are in either the forwarding or blocking state.

28. 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
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.
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

29. 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?
Data link
Show arp and Show interface
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

30. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
100 meters
Data link
Fiber optic cable.
Auto - Desirable - and On

31. 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
The sequence number in the TCP header.
It operates without collisions and It provides faster data transfer
Layer 4

32. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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.
Information about a route should never be sent back in the direction from which the original update came.

33. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
ARP and ICMP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Data link
An additional broadcast domain will be created.

34. 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?
The interfaces must be configured for NAT.
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
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.
A cross-over cable

35. 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?
TCP
Layer 3
Sequence number - Window size - and Acknowledgment number
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

36. 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?
ARP and ICMP
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 additional broadcast domain will be created.
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

37. 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
Configure the switch so that it has a lower priority than other switches in the network.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
VLAN and Swtich

38. 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?
Packet switching - Packet filtering and Internetwork communication.
VLAN and Swtich
100 meters
Source Port - Acknowledgment Number - and Window

39. 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
Show arp and Show interface
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Network

40. Which OSI layer header contains the address of a destination host that is on another network?
Network
100 meters
HTTPS
SMTP - FTP - HTTP - and HTTPS

41. 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)
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 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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
The interfaces must be configured for NAT.

42. 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
To prevent switching loops in networks with redundant switched paths.
VLAN and Swtich
Fiber optic cable.
Configure the switch so that it has a lower priority than other switches in the network.

43. 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?
HTTPS - SMTP - and TFTP
Decrease the window size.
A broadcast address will never be the source address of a frame
Port security

44. 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?
Information about a route should never be sent back in the direction from which the original update came.
Switches increase the number of collision domains in the network.
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

45. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The network layer
Encapsulations PPP and authentication CHAP
Auto - Desirable - and On

46. 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?
HTTPS
Application
The port is experiencing errors
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.

47. 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 switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Transport
Show cdp neighbor detail
Increased latency and Filtering of all frame errors

48. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Certkiller B > trace
Auto - On - and Desirable
The system is malfunctioning.

49. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Path selections and Packet switching.
Switches - Bridges - and Routers
All switch and bridge ports are in either the forwarding or blocking state.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

50. 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 interfaces must be configured for NAT.
SMTP FTP and HTTP
Packet switching - Packet filtering and Internetwork communication.
Configure the switch so that it has lower priority than other switches in the network

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