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CCNA Hard

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. 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?
Switches increase the number of collision domains in the network.
Configure the switch so that it has lower priority than other switches in the network
Show cdp neighbor detail
Learning - Listening - and Forwarding

2. 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?
Certkiller B > trace
Increased latency and Filtering of all frame errors
Sequence number - Window size - and Acknowledgment number
Switches - Bridges - and Routers

3. Which of the protocols below use TCP at the transport layer?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
SMTP - FTP - HTTP - and HTTPS
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Application

4. Which of the following correctly describe steps in the OSI date encapsulation process?
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.
Encapsulations PPP and authentication CHAP
Increased latency and Filtering of all frame errors

5. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
All switch and bridge ports are in either the forwarding or blocking state.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
The system is malfunctioning.
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

6. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
The system is malfunctioning.
The switch will forward the frame to a specific port
A cross-over cable
In an improperly implemented redundant topology

7. What kind of cable should be used to establish a trunked line between two Catalyst switches?
ARP and ICMP
Congestion avoidance - Windowing and Buffering
A cross-over cable
Auto - On - and Desirable

8. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
SMTP - FTP - HTTP - and HTTPS
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Network

9. Which of the following services use TCP?
SMTP FTP and HTTP
VLAN and Swtich
This is an Ethernet port operating at half duplex
To allow remote management of the switch.

10. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Sequence number - Window size - and Acknowledgment number
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Auto - Desirable - and On
Encapsulations PPP and authentication CHAP

11. Which of the following are true of Ethernet technology?
Switches increase the number of collision domains in the network.
Hosts use a logical bus topology
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Application

12. 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 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.
The port is experiencing errors
To prevent switching loops in networks with redundant switched paths.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

13. What is the IEEE standard associated with Gigabit Ethernet?
The system is malfunctioning.
802.3ab and 802.3z
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
An additional broadcast domain will be created.

14. 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?
VLAN and Swtich
Show arp and Show interface
Port security
Physical Layer and Datalink Layer

15. 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?
Encapsulations PPP and authentication CHAP
HTTPS
Show cdp neighbor detail
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

16. 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
Decrease the window size.
Data link
Show cdp neighbor detail
Switches - Bridges - and Routers

17. You want to influence the root bridge selection within the Certkiller LAN. Which two values are used by spanning tree protocol to elect a root bridge? (Choose two.)
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
MAC Address and Bridge Priority
This is an Ethernet port operating at half duplex
ARP and ICMP

18. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
To prevent switching loops in networks with redundant switched paths.
STP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
The port is experiencing errors

19. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Switches increase the number of collision domains in the network.
Telnet and FTP
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

20. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Auto - On - and Desirable
It operates without collisions and It provides faster data transfer
Information about a route should never be sent back in the direction from which the original update came.

21. 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?
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.
Certkiller B > trace
Port security
The network layer

22. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Encapsulations PPP and authentication CHAP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
All switch and bridge ports are in either the forwarding or blocking state.
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

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?
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
Telnet and FTP
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 broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

24. 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
HTTPS - SMTP - and TFTP
To allow remote management of the switch.
Show arp and Show interface
TCP

25. 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?
Fiber optic cable.
Show cdp neighbor detail
The interfaces must be configured for NAT.
The switch will forward the frame to a specific port

26. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Layer 3
VLAN and Swtich
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
TCP

27. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
The system is malfunctioning.
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
Path selections and Packet switching.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

28. 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
The Bridgeg ID and The bridge priority
VTP
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Show arp and Show interface

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?
Path selections and Packet switching.
Layer 3
STP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

30. 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
An additional broadcast domain will be created.
It is used to prevent switching loops in networks with redundant switched routes.
The network layer
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

31. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Transport
Duplex mismatch
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.

32. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Learning - Listening - and Forwarding
Show arp and Show interface
Information about a route should never be sent back in the direction from which the original update came.
Switches - Bridges - and Routers

33. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
TCP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

34. 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?
The port is experiencing errors
Decrease the window size.
The switch will forward the frame to a specific port
Auto - Desirable - and On

35. 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?
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.
This is an Ethernet port operating at half duplex
Information about a route should never be sent back in the direction from which the original update came.

36. 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
VTP
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.
The sequence number in the TCP header.
Encapsulations PPP and authentication CHAP

37. Which of the following can lead to the contribution of LAN traffic congestion?
All switch and bridge ports are in either the forwarding or blocking state.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
A broadcast address will never be the source address of a frame
VLAN and Swtich

38. Which two of the following values does STP take into consideration when it elects the root bridge?
Fiber optic cable.
VTP
The Bridgeg ID and The bridge priority
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.

39. 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?
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.
The interfaces must be configured for NAT.
Port security
Show cdp neighbor detail

40. What is the purpose of the spanning-tree algorithm in a switched LAN?
To prevent switching loops in networks with redundant switched paths.
Fiber optic cable.
VLAN and Swtich
VTP will allow switches to share VLAN configuration information

41. 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
Network
CertK Switch(config)# ip default-gateway 192.168.1.115
Encapsulations PPP and authentication CHAP

42. 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 will prevent segment 1's broadcasts from getting to segment 2.
VLAN and Swtich
To allow remote management of the switch.
The system is malfunctioning.

43. 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?
Network
The network layer
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
It operates without collisions and It provides faster data transfer

44. Which of the following correctly describe the various functions and virtues of a router?
802.1Q and ISL
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
It is the sum of the costs based on bandwidth
Packet switching - Packet filtering and Internetwork communication.

45. 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?
VTP will allow switches to share VLAN configuration information
Learning - Listening - and Forwarding
Source Port - Acknowledgment Number - and Window
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

46. 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
The system is malfunctioning.
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.
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.
It is the sum of the costs based on bandwidth

47. CDP is running between two CK devices. What information is supplied by CDP?
Data link
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 interfaces must be configured for NAT.
Device Identifiers - Capabilities list - Platform

48. By default - which of the following factors determines the spanning-tree path cost?
Path selections and Packet switching.
The network layer
It is the sum of the costs based on bandwidth
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

49. 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?
Decrease the window size.
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.
Application
Configure the switch so that it has lower priority than other switches in the network

50. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
This is an Ethernet port operating at half duplex
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
TCP
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router