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CCNA Hard

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Answer 50 questions in 15 minutes.
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1. With regard to Ethernet media access methods - which of the following are true?
A broadcast address will never be the source address of a frame
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 will prevent segment 1's broadcasts from getting to segment 2.
Switches increase the number of collision domains in the network.

2. 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
Layer 3
Telnet and FTP
Fiber optic cable.
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.

3. Which of the following correctly describe the various functions and virtues of a router?
An additional broadcast domain will be created.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Configure the switch so that it has lower priority than other switches in the network
Packet switching - Packet filtering and Internetwork communication.

4. 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.
Application
The interfaces must be configured for NAT.

5. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
The network layer
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Layer 4

6. 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?
Certkiller B > trace
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
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
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.

7. 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?
It operates without collisions and It provides faster data transfer
An additional broadcast domain will be created.
To allow remote management of the switch.
The interfaces must be configured for NAT.

8. 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)
802.3ab and 802.3z
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.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Auto - Desirable - and On

9. 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
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Show arp and Show interface
Port security
Hosts use a logical bus topology

10. 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?
Transport
Show cdp neighbor detail
The Bridgeg ID and The bridge priority
Information about a route should never be sent back in the direction from which the original update came.

11. What is the IEEE standard associated with Gigabit Ethernet?
The Bridgeg ID and The bridge priority
802.3ab and 802.3z
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Hosts use a logical bus topology

12. 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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13. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
The network layer
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
Transport
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.

14. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
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.
Layer 4
Device Identifiers - Capabilities list - Platform

15. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
Path selections and Packet switching.
Duplex mismatch
Application

16. Which protocol uses TCP port 443 at layer 4?
Sequence number - Window size - and Acknowledgment number
Duplex mismatch
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.
HTTPS

17. 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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Application
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
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.

18. 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?
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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
802.1Q and ISL

19. What kind of cable should be used to establish a trunked line between two Catalyst switches?
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.
A cross-over cable
A broadcast address will never be the source address of a frame
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.

20. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
To prevent switching loops in networks with redundant switched paths.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

21. 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.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
CertK Switch(config)# ip default-gateway 192.168.1.115
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

22. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Physical Layer and Datalink Layer
802.1Q and ISL
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.
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.

23. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
VTP
Layer 4
Duplex mismatch
Telnet and FTP

24. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
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.
Source Port - Acknowledgment Number - and Window
Data link
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

25. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
HTTPS
TCP
Physical Layer and Datalink Layer
Serial0/1 is down - line protocol is down

26. CDP is running between two CK devices. What information is supplied by CDP?
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.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Device Identifiers - Capabilities list - Platform
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

27. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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
Congestion avoidance - Windowing and Buffering

28. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Source Port - Acknowledgment Number - and Window
VTP will allow switches to share VLAN configuration information
Application
A hub and A repeater.

29. 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?
Duplex mismatch
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Switches increase the number of collision domains in the network.
The switch will forward the frame to a specific port

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?
Auto - On - and Desirable
Buffering - Cut-through - and Congestion avoidance
CertK Switch(config)# ip default-gateway 192.168.1.115
Port security

31. 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
HTTPS
The network layer
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
The interfaces must be configured for NAT.

32. 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?
Learning - Listening - and Forwarding
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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
SMTP FTP and HTTP

33. 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?
A broadcast address will never be the source address of a frame
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 lower priority than other switches in the network
Telnet and FTP

34. Which OSI layer header contains the address of a destination host that is on another network?
Network
HTTPS
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.
It will prevent segment 1's broadcasts from getting to segment 2.

35. 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
This is an Ethernet port operating at half duplex
Layer 3
Learning - Listening - and Forwarding
Data link

36. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Increased latency and Filtering of all frame errors
Encapsulations PPP and authentication CHAP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same 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.

37. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
STP
A broadcast address will never be the source address of a frame
MAC Address and Bridge Priority
Physical Layer and Datalink Layer

38. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
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.
Decrease the window size.
Information about a route should never be sent back in the direction from which the original update came.

39. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The system is malfunctioning.
Network
Physical Layer and Datalink Layer
Packet switching - Packet filtering and Internetwork communication.

40. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
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 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.
Data link
A cross-over cable

41. Which of the protocols below use TCP at the transport layer?
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.
SMTP - FTP - HTTP - and HTTPS
Physical Layer and Datalink Layer
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

42. 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?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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
An electrical pulse indicates that the collision has cleared.
The network layer

43. 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?
It is the sum of the costs based on bandwidth
Configure the switch so that it has lower priority than other switches in the network
The interfaces must be configured for NAT.
Application

44. 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
A broadcast address will never be the source address of a frame
VTP
To allow remote management of the switch.

45. What are two characteristics of 'store and forward' switching?
Configure the switch so that it has lower priority than other switches in the network
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Congestion avoidance - Windowing and Buffering
Data link

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?
802.1Q and ISL
Port security
An electrical pulse indicates that the collision has cleared.
The port is experiencing errors

47. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Show cdp neighbor detail
Auto - On - and Desirable
MAC Address and Bridge Priority
An electrical pulse indicates that the collision has cleared.

48. Which three of the protocols below belong to the application layer? (Select three answer choices)
Telnet and FTP
HTTPS - SMTP - and TFTP
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.
An electrical pulse indicates that the collision has cleared.

49. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
VTP
VLAN and Swtich
Serial0/1 is down - line protocol is down
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

50. In a switched LAN network - What is the Spanning-Tree algorithm used for?
The switch will forward the frame to a specific port
Network
It is used to prevent switching loops in networks with redundant switched routes.
Layer 3

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