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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. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
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
Congestion avoidance - Windowing and Buffering
Network

2. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
A hub and A repeater.
Layer 4
The system is malfunctioning.
STP

3. 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?
Physical Layer and Datalink Layer
Port security
Congestion avoidance - Windowing and Buffering
The switch will forward the frame to a specific port

4. Which of the following are types of flow control?
An additional broadcast domain will be created.
Auto - On - and Desirable
The network layer
Buffering - Cut-through - and Congestion avoidance

5. Which of the following services use TCP?
Port security
HTTPS
SMTP FTP and HTTP
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.

6. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Serial0/1 is down - line protocol is down
Learning - Listening - and Forwarding

7. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
CertK Switch(config)# ip default-gateway 192.168.1.115
TCP
ARP and ICMP
The system is malfunctioning.

8. What is the IEEE standard associated with Gigabit Ethernet?
802.3ab and 802.3z
Sequence number - Window size - and Acknowledgment number
Layer 4
Serial0/1 is down - line protocol is down

9. Which fields are included in the TCP header?
Telnet and FTP
Layer 4
Source Port - Acknowledgment Number - and Window
The network layer

10. By default - which of the following factors determines the spanning-tree path cost?
Layer 3
MAC Address and Bridge Priority
It is the sum of the costs based on bandwidth
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.

11. 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.
Application
An additional broadcast domain will be created.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

12. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Packet switching - Packet filtering and Internetwork communication.
It is used to prevent switching loops in networks with redundant switched routes.
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
SMTP - FTP - HTTP - and HTTPS

13. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
The system is malfunctioning.
Auto - Desirable - and On
Data link
A broadcast address will never be the source address of a frame

14. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
It is used to prevent switching loops in networks with redundant switched routes.
All switch and bridge ports are in either the forwarding or blocking state.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
ARP and ICMP

15. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
An electrical pulse indicates that the collision has cleared.
Device Identifiers - Capabilities list - Platform
Serial0/1 is down - line protocol is down
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.

16. 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
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
Application
The network layer

17. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Switches increase the number of collision domains in the network.
SMTP - FTP - HTTP - and HTTPS
Show arp and Show interface
Path selections and Packet switching.

18. 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?
Port security
Telnet and FTP
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.
Switches increase the number of collision domains in the network.

19. Which of the following are spanning tree port states?
Network
Learning - Listening - and Forwarding
Show cdp neighbor detail
SMTP FTP and HTTP

20. An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location?
Buffering - Cut-through - and Congestion avoidance
VTP
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.
In an improperly implemented redundant topology

21. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
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
To allow remote management of the switch.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
MAC Address and Bridge Priority

22. 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?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
VTP
TCP
A hub and A repeater.

23. 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
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
802.1Q and ISL
Layer 4

24. 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 receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The sequence number in the TCP header.
The switch will forward the frame to a specific port
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.

25. Which of the protocols below use TCP at the transport layer?
SMTP - FTP - HTTP - and HTTPS
Duplex mismatch
All switch and bridge ports are in either the forwarding or blocking state.
MAC Address and Bridge Priority

26. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
The network layer
Data link
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

27. 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?
802.1Q and ISL
A hub and A repeater.
It will prevent segment 1's broadcasts from getting to segment 2.
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.

28. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Switches - Bridges - and Routers
Buffering - Cut-through - and Congestion avoidance
Transport
A broadcast address will never be the source address of a frame

29. 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?
Increased latency and Filtering of all frame errors
VLAN and Swtich
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

30. 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?
Serial0/1 is down - line protocol is down
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
ARP and ICMP
The switch will forward the frame to a specific port

31. 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
802.1Q and ISL
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

32. 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?
Device Identifiers - Capabilities list - Platform
Hosts use a logical bus topology
Information about a route should never be sent back in the direction from which the original update came.
This is an Ethernet port operating at half duplex

33. Which one of the following characterisitcs is true regardigin the use of the hubs and switches?
The Bridgeg ID and The bridge priority
Physical Layer and Datalink Layer
Hosts use a logical bus topology
Switches increase the number of collision domains in the network.

34. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Transport
This is an Ethernet port operating at half duplex
Fiber optic cable.
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

35. CDP is running between two CK devices. What information is supplied by CDP?
Information about a route should never be sent back in the direction from which the original update came.
Device Identifiers - Capabilities list - Platform
Duplex mismatch
To allow remote management of the switch.

36. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Device Identifiers - Capabilities list - Platform
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
VTP will allow switches to share VLAN configuration information
Network

37. CDP is being used trhoughout the CK network. What are two reasons why the CK network administrator would use CDP?
Device Identifiers - Capabilities list - Platform
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.
CertK Switch(config)# ip default-gateway 192.168.1.115

38. 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 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 will allow switches to share VLAN configuration information
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.
The interfaces must be configured for NAT.

39. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in the Certkiller Switched LAN?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
STP
Decrease the window size.
In an improperly implemented redundant topology

40. What kind of cable should be used to establish a trunked line between two Catalyst switches?
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
A cross-over cable
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
Application

41. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
SMTP - FTP - HTTP - and HTTPS
Layer 4
802.1Q and ISL
A hub and A repeater.

42. 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
Telnet and FTP
Decrease the window size.
Congestion avoidance - Windowing and Buffering

43. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Serial0/1 is down - line protocol is down
This is an Ethernet port operating at half duplex
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Network

44. Which OSI layer header contains the address of a destination host that is on another network?
Network
Application
It is the sum of the costs based on bandwidth
100 meters

45. Which of the following are true of Ethernet technology?
A cross-over cable
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.
Hosts use a logical bus topology
It is used to prevent switching loops in networks with redundant switched routes.

46. 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?
VLAN and Swtich
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Hosts use a logical bus topology
TCP

47. What is the purpose of the spanning-tree algorithm in a switched LAN?
The system is malfunctioning.
To prevent switching loops in networks with redundant switched paths.
The Bridgeg ID and The bridge priority
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.

48. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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
Network

49. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
HTTPS
Network
Transport

50. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
MAC Address and Bridge Priority
Switches - Bridges - and Routers
802.1Q and ISL

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