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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. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Physical Layer and Datalink Layer
VTP will allow switches to share VLAN configuration information
A broadcast address will never be the source address of a frame
It will prevent segment 1's broadcasts from getting to segment 2.

2. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Encapsulations PPP and authentication CHAP
Data link
SMTP - FTP - HTTP - and HTTPS
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

3. Which of the following services use TCP?
SMTP - FTP - HTTP - and HTTPS
SMTP FTP and HTTP
To prevent switching loops in networks with redundant switched paths.
An electrical pulse indicates that the collision has cleared.

4. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
A cross-over cable
Data link

5. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
The network layer
Buffering - Cut-through - and Congestion avoidance
Duplex mismatch
802.1Q and ISL

6. 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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7. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Port security
The system is malfunctioning.
Switches increase the number of collision domains in the network.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

8. 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
Fiber optic cable.
The network layer
To allow remote management of the switch.
The system is malfunctioning.

9. 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?
Configure the switch so that it has lower priority than other switches in the network
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
Application
VTP will allow switches to share VLAN configuration information

10. 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
The sequence number in the TCP header.
Encapsulations PPP and authentication CHAP
Network
Layer 4

11. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
Data link
Layer 4
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

12. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
A cross-over cable
An electrical pulse indicates that the collision has cleared.
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 broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

13. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Telnet and FTP
Packet switching - Packet filtering and Internetwork communication.
Network
Information about a route should never be sent back in the direction from which the original update came.

14. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Certkiller B > trace
The switch will forward the frame to a specific port
ARP and ICMP

15. 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?
Encapsulations PPP and authentication CHAP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Layer 3
Configure the switch so that it has a lower priority than other switches in the network.

16. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
VLAN and Swtich
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.
SMTP FTP and HTTP
The sequence number in the TCP header.

17. What is the purpose of the spanning-tree algorithm in a switched LAN?
SMTP FTP and HTTP
The network layer
To prevent switching loops in networks with redundant switched paths.
It will prevent segment 1's broadcasts from getting to segment 2.

18. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
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
Encapsulations PPP and authentication CHAP
VLAN and Swtich

19. 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?
VTP
A hub and A repeater.
Physical Layer and Datalink Layer
The system is malfunctioning.

20. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
VTP will allow switches to share VLAN configuration information
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

21. While troubleshooting an issue in the Certkiller LAN you notice that a network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement - What is known about the network interface port?
Fiber optic cable.
The interfaces must be configured for NAT.
The system is malfunctioning.
This is an Ethernet port operating at half duplex

22. Which of the following devices can the Certkiller network administrator use to segment the LAN?
HTTPS - SMTP - and TFTP
Sequence number - Window size - and Acknowledgment number
VLAN and Swtich
Switches - Bridges - and Routers

23. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
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.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
A cross-over cable
Network

24. 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
MAC Address and Bridge Priority
Port security
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Duplex mismatch

25. 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?
Layer 3
Network
The Bridgeg ID and The bridge priority
To prevent switching loops in networks with redundant switched paths.

26. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
The system is malfunctioning.
VTP
Network
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.

27. 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?
Certkiller B > trace
Physical Layer and Datalink Layer
Switches increase the number of collision domains in the network.
The port is experiencing errors

28. 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?
An additional broadcast domain will be created.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
VTP will allow switches to share VLAN configuration information
A hub and A repeater.

29. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Learning - Listening - and Forwarding
Switches - Bridges - and Routers
Layer 4
Packet switching - Packet filtering and Internetwork communication.

30. Which of the following are types of flow control?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
All switch and bridge ports are in either the forwarding or blocking state.
Buffering - Cut-through - and Congestion avoidance
Device Identifiers - Capabilities list - Platform

31. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
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.
Auto - Desirable - and On
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
The interfaces must be configured for NAT.

32. 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)
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Encapsulations PPP and authentication CHAP
To allow remote management of the switch.
A hub and A repeater.

33. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Auto - On - and Desirable
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.
Encapsulations PPP and authentication CHAP
SMTP FTP and HTTP

34. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
A cross-over cable
Layer 4
In an improperly implemented redundant topology

35. 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
Sequence number - Window size - and Acknowledgment number
Data link
Port security

36. 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?
The switch will forward the frame to a specific port
An electrical pulse indicates that the collision has cleared.
Show cdp neighbor detail
It will prevent segment 1's broadcasts from getting to segment 2.

37. CDP is running between two CK devices. What information is supplied by CDP?
Device Identifiers - Capabilities list - Platform
Configure the switch so that it has lower priority than other switches in the 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.
100 meters

38. 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.
Application
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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
802.3ab and 802.3z

39. Although TCP segments are similar to UDP segments - TCP packets contains some additional fields. Which of the following are found in a TCP header - but not in a UDP header?
100 meters
Fiber optic cable.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Sequence number - Window size - and Acknowledgment number

40. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
To allow remote management of the switch.
VTP
Physical Layer and Datalink Layer
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

41. 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?
Telnet and FTP
Auto - Desirable - and On
Network
802.3ab and 802.3z

42. Which of the following can lead to the contribution of LAN traffic congestion?
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.
Layer 4
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Port security

43. With regard to Ethernet media access methods - which of the following are true?
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 sequence number in the TCP header.
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.

44. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
STP
Port security
Decrease the window size.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

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

46. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
The Bridgeg ID and The bridge priority
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.
It operates without collisions and It provides faster data transfer
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

47. 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?
VTP
Device Identifiers - Capabilities list - Platform
An electrical pulse indicates that the collision has cleared.
A hub and A repeater.

48. 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 cross-over cable
Physical Layer and Datalink Layer
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 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.

49. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
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
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Congestion avoidance - Windowing and Buffering

50. 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
Switches - Bridges - and Routers
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
100 meters
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

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