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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. What is the purpose of the spanning-tree algorithm in a switched LAN?
The port is experiencing errors
This is an Ethernet port operating at half duplex
To prevent switching loops in networks with redundant switched paths.
Duplex mismatch

2. 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.
This is an Ethernet port operating at half duplex
The network layer
Data link

3. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Show arp and Show interface
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
It is used to prevent switching loops in networks with redundant switched routes.

4. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
STP
An electrical pulse indicates that the collision has cleared.

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?
Show arp and Show interface
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.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Packet switching - Packet filtering and Internetwork communication.

6. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
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.
All switch and bridge ports are in either the forwarding or blocking state.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

7. 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)
Configure the switch so that it has a lower priority than other switches in the network.
Packet switching - Packet filtering and Internetwork communication.
Buffering - Cut-through - and Congestion avoidance
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

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
Buffering - Cut-through - and Congestion avoidance
The network layer
Layer 4
Duplex mismatch

9. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
All switch and bridge ports are in either the forwarding or blocking state.
An additional broadcast domain will be created.
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 - HTTP - and HTTPS

10. 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
It operates without collisions and It provides faster data transfer
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

11. 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?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Show cdp neighbor detail
The port is experiencing errors
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

12. CDP is running between two CK devices. What information is supplied by CDP?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
CertK Switch(config)# ip default-gateway 192.168.1.115
The Bridgeg ID and The bridge priority
Device Identifiers - Capabilities list - Platform

13. 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?
An electrical pulse indicates that the collision has cleared.
A hub and A repeater.
The interfaces must be configured for NAT.
It is used to prevent switching loops in networks with redundant switched routes.

14. 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?
Layer 4
CertK Switch(config)# ip default-gateway 192.168.1.115
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.
Show cdp neighbor detail

15. Which of the following are true of Ethernet technology?
Configure the switch so that it has lower priority than other switches in the network
Hosts use a logical bus topology
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
TCP

16. 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?
It operates without collisions and It provides faster data transfer
Sequence number - Window size - and Acknowledgment number
Switches increase the number of collision domains in the network.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

17. 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.
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.
Network
Auto - Desirable - and On

18. Which of the following devices can the Certkiller network administrator use to segment the LAN?
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.
Switches - Bridges - and Routers
MAC Address and Bridge Priority
STP

19. What are two characteristics of 'store and forward' switching?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Application
Packet switching - Packet filtering and Internetwork communication.
Source Port - Acknowledgment Number - and Window

20. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Layer 4
The interfaces must be configured for NAT.
VTP will allow switches to share VLAN configuration information
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.

21. 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?
The port is experiencing errors
HTTPS - SMTP - and TFTP
Port security
Telnet and FTP

22. 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?
Transport
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
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.
Show arp and Show interface

23. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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
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
Sequence number - Window size - and Acknowledgment number

24. 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?
Port security
802.3ab and 802.3z
Congestion avoidance - Windowing and Buffering
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

25. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
Layer 4
Switches increase the number of collision domains in the network.
To prevent switching loops in networks with redundant switched paths.
VLAN and Swtich

26. Which three of the protocols below belong to the application layer? (Select three answer choices)
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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
HTTPS - SMTP - and TFTP

27. Which OSI layer header contains the address of a destination host that is on another network?
Duplex mismatch
Layer 4
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
Network

28. Which of the following services use TCP?
Switches increase the number of collision domains in the network.
SMTP FTP and HTTP
802.1Q and ISL
Decrease the window size.

29. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
In an improperly implemented redundant topology
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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.
Network

30. Which of the following are types of flow control?
Layer 4
MAC Address and Bridge Priority
Buffering - Cut-through - and Congestion avoidance
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

31. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
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.
Device Identifiers - Capabilities list - Platform
Network
VLAN and Swtich

32. 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
Data link
A hub and A repeater.
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.
SMTP FTP and HTTP

33. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Hosts use a logical bus topology
Layer 4
Information about a route should never be sent back in the direction from which the original update came.
Duplex mismatch

34. Which protocol uses TCP port 443 at layer 4?
HTTPS
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.
CertK Switch(config)# ip default-gateway 192.168.1.115
SMTP FTP and HTTP

35. 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.
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.
Show arp and Show interface
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

36. 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
Application
Duplex mismatch
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

37. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Configure the switch so that it has a lower priority than other switches in the network.
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 system is malfunctioning.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

38. 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
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
Congestion avoidance - Windowing and Buffering
VTP
VLAN and Swtich

39. 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.
It is used to prevent switching loops in networks with redundant switched routes.
STP
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

40. 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 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.
ARP and ICMP
TCP
Certkiller B > trace

41. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Show arp and Show interface
TCP
802.1Q and ISL
An additional broadcast domain will be created.

42. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
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.
Layer 3
Encapsulations PPP and authentication CHAP
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

43. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
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.
Serial0/1 is down - line protocol is down
A cross-over cable

44. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
TCP
Auto - On - and Desirable
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.
Transport

45. 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?
100 meters
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
CertK Switch(config)# ip default-gateway 192.168.1.115
Layer 4

46. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Application
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
Show arp and Show interface
Path selections and Packet switching.

47. Which fields are included in the TCP header?
Application
ARP and ICMP
Source Port - Acknowledgment Number - and Window
The switch will forward the frame to a specific port

48. 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.
Application
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
HTTPS - SMTP - and TFTP

49. With regard to Ethernet media access methods - which of the following are true?
Hosts use a logical bus topology
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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.
It is used to prevent switching loops in networks with redundant switched routes.

50. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
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.
It is used to prevent switching loops in networks with redundant switched routes.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
In an improperly implemented redundant topology