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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. 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
It operates without collisions and It provides faster data transfer
MAC Address and Bridge Priority
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Data link

2. 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?
Serial0/1 is down - line protocol is down
Auto - Desirable - and On
Physical Layer and Datalink Layer
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

3. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
Show cdp neighbor detail
The network layer
100 meters

4. 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)
Increased latency and Filtering of all frame errors
Port security
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

5. Which of the following are spanning tree port states?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Learning - Listening - and Forwarding
SMTP FTP and HTTP
VTP

6. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The network layer
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Auto - On - and Desirable

7. 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
802.3ab and 802.3z
Data link
Buffering - Cut-through - and Congestion avoidance

8. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
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.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
TCP

9. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
Application
Configure the switch so that it has a lower priority than other switches in the network.
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.

10. 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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
The network layer
All switch and bridge ports are in either the forwarding or blocking state.
Configure the switch so that it has lower priority than other switches in the network

11. 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?
To allow remote management of the switch.
The system is malfunctioning.
The port is experiencing errors
Configure the switch so that it has a lower priority than other switches in the network.

12. 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
It operates without collisions and It provides faster data transfer
Decrease the window size.
Telnet and FTP
Duplex mismatch

13. 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
Decrease the window size.
ARP and ICMP
Sequence number - Window size - and Acknowledgment number

14. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.
Transport
A cross-over cable

15. 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?
Decrease the window size.
Telnet and FTP
Switches - Bridges - and Routers
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.

16. Which of the following services use TCP?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
SMTP FTP and HTTP
Physical Layer and Datalink Layer
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

17. By default - which of the following factors determines the spanning-tree path cost?
Increased latency and Filtering of all frame errors
It is the sum of the costs based on bandwidth
Duplex mismatch
All switch and bridge ports are in either the forwarding or blocking state.

18. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Fiber optic cable.
VTP will allow switches to share VLAN configuration information
802.1Q and ISL
Transport

19. Which two of the following values does STP take into consideration when it elects the root bridge?
The Bridgeg ID and The bridge priority
Show arp and Show interface
It operates without collisions and It provides faster data transfer
Increased latency and Filtering of all frame errors

20. 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 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.
Data link
Layer 3
Learning - Listening - and Forwarding

21. 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?
Auto - Desirable - and On
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
Switches increase the number of collision domains in the network.
VTP

22. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Transport
Auto - On - and Desirable
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

23. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Network
Packet switching - Packet filtering and Internetwork communication.
Auto - On - and Desirable

24. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Auto - On - and Desirable
Sequence number - Window size - and Acknowledgment number
SMTP FTP and HTTP
Information about a route should never be sent back in the direction from which the original update came.

25. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Duplex mismatch
Layer 4
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Serial0/1 is down - line protocol is down

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

27. 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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28. What is the IEEE standard associated with Gigabit Ethernet?
Packet switching - Packet filtering and Internetwork communication.
802.3ab and 802.3z
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Transport

29. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
SMTP FTP and HTTP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Port security
STP

30. Which protocol uses TCP port 443 at layer 4?
HTTPS
VTP
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

31. Which OSI layer header contains the address of a destination host that is on another network?
Network
All switch and bridge ports are in either the forwarding or blocking state.
VLAN and Swtich
HTTPS - SMTP - and TFTP

32. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
It operates without collisions and It provides faster data transfer
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The system is malfunctioning.

33. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Auto - On - and Desirable
In an improperly implemented redundant topology
Fiber optic cable.
The Bridgeg ID and The bridge priority

34. Which of the protocols below use TCP at the transport layer?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
In an improperly implemented redundant topology
SMTP - FTP - HTTP - and HTTPS
The network layer

35. 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?
VLAN and Swtich
Duplex mismatch
Port security
It operates without collisions and It provides faster data transfer

36. Which of the following correctly describe steps in the OSI date encapsulation process?
Auto - Desirable - and On
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.
The system is malfunctioning.
STP

37. 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
ARP and ICMP
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.
Decrease the window size.

38. 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
In an improperly implemented redundant topology
CertK Switch(config)# ip default-gateway 192.168.1.115
An additional broadcast domain will be created.

39. 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?
Buffering - Cut-through - and Congestion avoidance
Network
Increased latency and Filtering of all frame errors
Configure the switch so that it has a lower priority than other switches in the network.

40. 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?
The interfaces must be configured for NAT.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.
In an improperly implemented redundant topology

41. 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.
Fiber optic cable.
802.1Q and ISL
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

42. 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?
Configure the switch so that it has lower priority than other switches in the network
Encapsulations PPP and authentication CHAP
Decrease the window size.
VLAN and Swtich

43. 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?
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.
Fiber optic cable.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

44. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
This is an Ethernet port operating at half duplex
Physical Layer and Datalink Layer
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.

45. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Data link
Information about a route should never be sent back in the direction from which the original update came.
It is used to prevent switching loops in networks with redundant switched routes.
To allow remote management of the switch.

46. CDP is running between two CK devices. What information is supplied by CDP?
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 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
Device Identifiers - Capabilities list - Platform
CertK Switch(config)# ip default-gateway 192.168.1.115

47. 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?
Network
To allow remote management of the switch.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
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

48. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Show arp and Show interface
Switches - Bridges - and Routers
802.3ab and 802.3z
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.

49. 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?
The network layer
HTTPS - SMTP - and TFTP
To prevent switching loops in networks with redundant switched paths.
ARP and ICMP

50. Which fields are included in the TCP header?
To prevent switching loops in networks with redundant switched paths.
The Bridgeg ID and The bridge priority
The switch will forward the frame to a specific port
Source Port - Acknowledgment Number - and Window

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