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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. 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?
VTP
Duplex mismatch
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

2. Which of the following correctly describe the various functions and virtues of a router?
To prevent switching loops in networks with redundant switched paths.
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.
Packet switching - Packet filtering and Internetwork communication.
Show cdp neighbor detail

3. 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 sequence number in the TCP header.
Switches - Bridges - and Routers
An additional broadcast domain will be created.

4. 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
Auto - Desirable - and On
This is an Ethernet port operating at half duplex
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.

5. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
HTTPS
100 meters
Physical Layer and Datalink Layer

6. You need to describe the various types of flow control to your co-workers. Which of the following are types of flow control that can be used in a network?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Congestion avoidance - Windowing and Buffering
It will prevent segment 1's broadcasts from getting to segment 2.
It operates without collisions and It provides faster data transfer

7. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
In an improperly implemented redundant topology
802.1Q and ISL
MAC Address and Bridge Priority
VTP

8. What kind of cable should be used to establish a trunked line between two Catalyst switches?
Layer 4
STP
A cross-over cable
Serial0/1 is down - line protocol is down

9. Which of the following are true of Ethernet technology?
Hosts use a logical bus topology
The interfaces must be configured for NAT.
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.
VLAN and Swtich

10. 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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11. What is the purpose of the spanning-tree algorithm in a switched LAN?
A cross-over cable
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.
Physical Layer and Datalink Layer
To prevent switching loops in networks with redundant switched paths.

12. 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
Source Port - Acknowledgment Number - and Window
Switches - Bridges - and Routers
HTTPS

13. Which protocol uses TCP port 443 at layer 4?
HTTPS
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.
802.3ab and 802.3z
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

14. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
Data link
It is used to prevent switching loops in networks with redundant switched routes.
Port security
Duplex mismatch

15. 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?
Configure the switch so that it has lower priority than other switches in the network
Sequence number - Window size - and Acknowledgment number
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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.

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?
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.
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.
Application
Sequence number - Window size - and Acknowledgment number

17. 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?
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
HTTPS - SMTP - and TFTP
To prevent switching loops in networks with redundant switched paths.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

18. 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 cross-over cable
VTP
SMTP - FTP - HTTP - and HTTPS

19. 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?
The system is malfunctioning.
The port is experiencing errors
An additional broadcast domain will be created.
Switches increase the number of collision domains in the network.

20. 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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
It will prevent segment 1's broadcasts from getting to segment 2.
Packet switching - Packet filtering and Internetwork communication.

21. 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
The switch will forward the frame to a specific port
Show arp and Show interface
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
ARP and ICMP

22. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Transport
It operates without collisions and It provides faster data transfer
A hub and A repeater.
Switches - Bridges - and Routers

23. 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?
Data link
Application
SMTP - FTP - HTTP - and HTTPS
Layer 4

24. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Path selections and Packet switching.
SMTP - FTP - HTTP - and HTTPS
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
SMTP FTP and HTTP

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
Hosts use a logical bus 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
Application

26. 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
802.3ab and 802.3z
Hosts use a logical bus topology
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

27. 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?
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.
Sequence number - Window size - and Acknowledgment number
SMTP FTP and HTTP
Switches - Bridges - and Routers

28. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
The port is experiencing errors
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.
To allow remote management of the switch.
A broadcast address will never be the source address of a frame

29. 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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
STP

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?
This is an Ethernet port operating at half duplex
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.
802.1Q and ISL
Port security

31. A Certkiller switch is configured with all ports assigned to VLAN 2. In addition - all ports are configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on this switch?
An additional broadcast domain will be created.
A hub and A repeater.
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

32. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
An electrical pulse indicates that the collision has cleared.
TCP
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

33. 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
Port security
To prevent switching loops in networks with redundant switched paths.
Data link
All switch and bridge ports are in either the forwarding or blocking state.

34. 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.
SMTP FTP and HTTP
Application
The network layer
A hub and A repeater.

35. 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)
Hosts use a logical bus topology
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
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.
Serial0/1 is down - line protocol is down

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?
Device Identifiers - Capabilities list - Platform
Show arp and Show interface
Certkiller B > trace
Show cdp neighbor detail

37. Cisco is the leader in the router market space. What basic functions do their routers perform in a 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
Hosts use a logical bus topology
Path selections and Packet switching.
An electrical pulse indicates that the collision has cleared.

38. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
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.
TCP
STP
It will prevent segment 1's broadcasts from getting to segment 2.

39. 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?
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
Decrease the window size.
Learning - Listening - and Forwarding
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.

40. 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
The system is malfunctioning.
802.1Q and ISL
Layer 4

41. 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?
Layer 4
It will prevent segment 1's broadcasts from getting to segment 2.
ARP and ICMP
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.

42. Split horizon has been enabled within the Certkiller routed network. Which one of the following statements best explains the split horizon rule?
Information about a route should never be sent back in the direction from which the original update came.
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
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.

43. 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?
Increased latency and Filtering of all frame errors
Source Port - Acknowledgment Number - and Window
Configure the switch so that it has lower priority than other switches in the network
This is an Ethernet port operating at half duplex

44. Which OSI layer header contains the address of a destination host that is on another network?
ARP and ICMP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Network
Layer 3

45. Which of the following services use TCP?
Switches increase the number of collision domains in the network.
SMTP FTP and HTTP
Full-duplex Ethernet can provide higher throughout 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.

46. 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 hub and A repeater.
CertK Switch(config)# ip default-gateway 192.168.1.115
Configure the switch so that it has lower priority than other switches in the network

47. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Source Port - Acknowledgment Number - and Window
Port security
Sequence number - Window size - and Acknowledgment number
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

48. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Fiber optic cable.
ARP and ICMP
VTP will allow switches to share VLAN configuration information
Switches - Bridges - and Routers

49. 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
Application
Congestion avoidance - Windowing and Buffering
The network layer
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.

50. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
This is an Ethernet port operating at half duplex
Path selections and Packet switching.
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
Device Identifiers - Capabilities list - Platform