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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. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Packet switching - Packet filtering and Internetwork communication.
The interfaces must be configured for NAT.

2. 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?
Configure the switch so that it has lower priority than other switches in the network
Switches increase the number of collision domains in the network.
Layer 3
STP

3. 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?
Application
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
SMTP FTP and HTTP
Learning - Listening - and Forwarding

4. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
The system is malfunctioning.
All switch and bridge ports are in either the forwarding or blocking state.
Port security
VTP will allow switches to share VLAN configuration information

5. 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?
To allow remote management of the switch.
TCP
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.
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.

6. 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
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
All switch and bridge ports are in either the forwarding or blocking state.
Duplex mismatch

7. 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?
In an improperly implemented redundant topology
VTP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
It operates without collisions and It provides faster data transfer

8. 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?
The interfaces must be configured for NAT.
802.1Q and ISL
It operates without collisions and It provides faster data transfer
ARP and ICMP

9. Which of the following correctly describe steps in the OSI date encapsulation process?
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.
Network
Decrease the window size.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

10. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Information about a route should never be sent back in the direction from which the original update came.
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.
Switches increase the number of collision domains in the network.

11. 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.
The network layer
Configure the switch so that it has lower priority than other switches in the network
Congestion avoidance - Windowing and Buffering

12. 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?
Auto - Desirable - and On
The switch will forward the frame to a specific port
Physical Layer and Datalink Layer
Serial0/1 is down - line protocol is down

13. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Auto - On - and Desirable
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.
TCP

14. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
An electrical pulse indicates that the collision has cleared.
The system is malfunctioning.
In an improperly implemented redundant topology
100 meters

15. 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?
This is an Ethernet port operating at half duplex
Layer 4
Transport
CertK Switch(config)# ip default-gateway 192.168.1.115

16. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Show arp and Show interface
Device Identifiers - Capabilities list - Platform
Switches increase the number of collision domains in the network.
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.

17. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Transport
Serial0/1 is down - line protocol is down
To allow remote management of the switch.
Configure the switch so that it has lower priority than other switches in the network

18. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Sequence number - Window size - and Acknowledgment number
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

19. 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?
Physical Layer and Datalink Layer
Path selections and Packet switching.
Hosts use a logical bus topology
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

20. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
TCP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Application
Auto - Desirable - and On

21. 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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Path selections and Packet switching.
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.
Application

22. What is the purpose of the spanning-tree algorithm in a switched LAN?
Device Identifiers - Capabilities list - Platform
SMTP FTP and HTTP
To prevent switching loops in networks with redundant switched paths.
CertK Switch(config)# ip default-gateway 192.168.1.115

23. 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
Data link
Auto - On - and Desirable
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.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

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
Encapsulations PPP and authentication CHAP
The sequence number in the TCP header.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Switches increase the number of collision domains in the network.

25. 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?
Sequence number - Window size - and Acknowledgment number
Decrease the window size.
It is the sum of the costs based on bandwidth
Layer 4

26. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Sequence number - Window size - and Acknowledgment number
Physical Layer and Datalink Layer
Switches - Bridges - and Routers
An additional broadcast domain will be created.

27. 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?
An electrical pulse indicates that the collision has cleared.
Configure the switch so that it has lower priority than other switches in the network
Data link
Port security

28. 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?
VLAN and Swtich
Layer 3
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
To allow remote management of the switch.

29. 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?
The sequence number in the TCP header.
Decrease the window size.
Layer 3
Telnet and FTP

30. What is the IEEE standard associated with Gigabit Ethernet?
Congestion avoidance - Windowing and Buffering
STP
802.3ab and 802.3z
Auto - Desirable - and On

31. 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.
HTTPS
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
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

32. 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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33. With regard to Ethernet media access methods - which of the following are true?
Data link
Duplex mismatch
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.
802.3ab and 802.3z

34. 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)
The switch will forward the frame to a specific port
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.

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
100 meters
To allow remote management of the switch.
VTP
Data link

36. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
It is the sum of the costs based on bandwidth
Congestion avoidance - Windowing and Buffering
Show cdp neighbor detail
Auto - Desirable - and On

37. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
HTTPS
Auto - On - and Desirable
TCP
Physical Layer and Datalink Layer

38. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
HTTPS - SMTP - and TFTP
To prevent switching loops in networks with redundant switched paths.
A cross-over cable
Data link

39. 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?
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.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Transport

40. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Configure the switch so that it has a lower priority than other switches in the network.
Switches - Bridges - and Routers
VLAN and Swtich
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

41. 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
Application
Transport
In an improperly implemented redundant topology
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

42. 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
VLAN and Swtich
It is the sum of the costs based on bandwidth
To prevent switching loops in networks with redundant switched paths.
Data link

43. 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
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
Decrease the window size.
Application
The network layer

44. 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.
SMTP - FTP - HTTP - and HTTPS
It is used to prevent switching loops in networks with redundant switched routes.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

45. 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
Application
Duplex mismatch

46. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
An electrical pulse indicates that the collision has cleared.
The port is experiencing errors
Encapsulations PPP and authentication CHAP
Certkiller B > trace

47. By default - which of the following factors determines the spanning-tree path cost?
Path selections and Packet switching.
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
100 meters

48. 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?
Increased latency and Filtering of all frame errors
Path selections and Packet switching.
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
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

49. Which of the following can lead to the contribution of LAN traffic congestion?
A hub and A repeater.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
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.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

50. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
To prevent switching loops in networks with redundant switched paths.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
An electrical pulse indicates that the collision has cleared.
802.3ab and 802.3z

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