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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. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
This is an Ethernet port operating at half duplex
Configure the switch so that it has a lower priority than other switches in the network.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

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?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Duplex mismatch
It operates without collisions and It provides faster data transfer
Increased latency and Filtering of all frame errors

3. 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?
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
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
SMTP FTP and HTTP

4. With regard to Ethernet media access methods - which of the following are true?
Certkiller B > trace
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.
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.
Auto - On - and Desirable

5. What kind of cable should be used to establish a trunked line between two Catalyst switches?
A cross-over cable
The port is experiencing errors
Show arp and Show interface
Physical Layer and Datalink Layer

6. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
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.
STP
100 meters

7. 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?
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.
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.
It operates without collisions and It provides faster data transfer

8. 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
Layer 3
SMTP - FTP - HTTP - and HTTPS
Telnet and FTP

9. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
In an improperly implemented redundant topology
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
An electrical pulse indicates that the collision has cleared.
Duplex mismatch

10. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
Switches increase the number of collision domains in the network.
TCP
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Configure the switch so that it has lower priority than other switches in the network

11. 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?
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 allow remote management of the switch.
Configure the switch so that it has lower priority than other switches in the network
Application

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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
The interfaces must be configured for NAT.
The switch will forward the frame to a specific port

13. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Auto - Desirable - and On
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Increased latency and Filtering of all frame errors

14. Which of the protocols below use TCP at the transport layer?
This is an Ethernet port operating at half duplex
SMTP - FTP - HTTP - and HTTPS
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 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.

15. 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.)
The network layer
It is used to prevent switching loops in networks with redundant switched routes.
MAC Address and Bridge Priority
Encapsulations PPP and authentication CHAP

16. Which protocol uses TCP port 443 at layer 4?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The Bridgeg ID and The bridge priority
HTTPS
Data link

17. By default - which of the following factors determines the spanning-tree path cost?
It is the sum of the costs based on bandwidth
It operates without collisions and It provides faster data transfer
Duplex mismatch
Application

18. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
VTP will allow switches to share VLAN configuration information
Data link
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
VLAN and Swtich

19. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
HTTPS
Data link
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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

20. 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
An additional broadcast domain will be created.
The sequence number in the TCP header.
Show cdp neighbor detail
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

21. 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.
802.3ab and 802.3z
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Layer 3

22. Which OSI layer header contains the address of a destination host that is on another 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.
Auto - On - and Desirable
Network
100 meters

23. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
The switch will forward the frame to a specific port
A broadcast address will never be the source address of a frame
The port is experiencing errors
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

24. CDP is running between two CK devices. What information is supplied by CDP?
The switch will forward the frame to a specific port
Device Identifiers - Capabilities list - Platform
Decrease the window size.
Packet switching - Packet filtering and Internetwork communication.

25. 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?
All switch and bridge ports are in either the forwarding or blocking state.
Switches increase the number of collision domains in the network.
An electrical pulse indicates that the collision has cleared.
Application

26. In a switched LAN network - What is the Spanning-Tree algorithm used for?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
100 meters
It is used to prevent switching loops in networks with redundant switched routes.
ARP and ICMP

27. 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?
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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The interfaces must be configured for NAT.

28. 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
Layer 4
Auto - Desirable - and On

29. 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
Network
TCP
Switches - Bridges - and Routers
Show arp and Show interface

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?
VLAN and Swtich
The network layer
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.
Port security

31. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
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
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Information about a route should never be sent back in the direction from which the original update came.

32. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same 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
Switches increase the number of collision domains in the network.
Show cdp neighbor detail

33. 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 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 prevent switching loops in networks with redundant switched paths.
Physical Layer and Datalink Layer
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

34. Which fields are included in the TCP header?
Source Port - Acknowledgment Number - and Window
The network layer
Packet switching - Packet filtering and Internetwork communication.
Telnet and FTP

35. 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
The system is malfunctioning.
STP
The network layer
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

36. What is the IEEE standard associated with Gigabit Ethernet?
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.
SMTP - FTP - HTTP - and HTTPS
Learning - Listening - and Forwarding
802.3ab and 802.3z

37. 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?
Transport
Congestion avoidance - Windowing and Buffering
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.
VTP

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.
This is an Ethernet port operating at half duplex
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.
STP
Application

39. 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.
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
ARP and ICMP
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.

40. 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
Layer 4
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
This is an Ethernet port operating at half duplex

41. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Switches - Bridges - and Routers
It operates without collisions and It provides faster data transfer
Serial0/1 is down - line protocol is down
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

42. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Fiber optic cable.
Path selections and Packet switching.
Buffering - Cut-through - and Congestion avoidance
802.1Q and ISL

43. 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?
It is used to prevent switching loops in networks with redundant switched routes.
Configure the switch so that it has a lower priority than other switches in the network.
The network layer
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

44. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
VTP will allow switches to share VLAN configuration information
HTTPS - SMTP - and TFTP
802.1Q and ISL
Device Identifiers - Capabilities list - Platform

45. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Certkiller B > trace
Source Port - Acknowledgment Number - and Window
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

46. Which of the following services use TCP?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Switches increase the number of collision domains in the network.
SMTP FTP and HTTP
The port is experiencing errors

47. What are two characteristics of 'store and forward' switching?
ARP and ICMP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
VLAN and Swtich
Fiber optic cable.

48. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Switches increase the number of collision domains in the network.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
802.3ab and 802.3z

49. 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?
ARP and ICMP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Physical Layer and Datalink Layer

50. 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?
A hub and A repeater.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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.
Layer 4