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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. 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.
ARP and ICMP
Data link
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

2. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
Congestion avoidance - Windowing and Buffering
To allow remote management of the switch.
An additional broadcast domain will be created.

3. 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?
The interfaces must be configured for NAT.
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.
Application
SMTP FTP and HTTP

4. Which of following VLAN frame encapsulation types are configurable on a Cisco switch?
Transport
Network
Duplex mismatch
802.1Q and ISL

5. 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?
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
STP
Transport
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. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.
Serial0/1 is down - line protocol is down
Switches - Bridges - and Routers

7. What is the purpose of the spanning-tree algorithm in a switched LAN?
The port is experiencing errors
It is used to prevent switching loops in networks with redundant switched routes.
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.

8. Which OSI layer header contains the address of a destination host that is on another network?
VLAN and Swtich
Learning - Listening - and Forwarding
Network
Show arp and Show interface

9. Which of the following are types of flow control?
Buffering - Cut-through - and Congestion avoidance
Sequence number - Window size - and Acknowledgment number
HTTPS
This is an Ethernet port operating at half duplex

10. Which fields are included in the TCP header?
Decrease the window size.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
The interfaces must be configured for NAT.
Source Port - Acknowledgment Number - and Window

11. 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 operates without collisions and It provides faster data transfer
Configure the switch so that it has a lower priority than other switches in the network.
Port security
Application

12. 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?
CertK Switch(config)# ip default-gateway 192.168.1.115
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.
Transport
An electrical pulse indicates that the collision has cleared.

13. You are experiencing intermittent issues relating to congestion within the Certkiller network. What are the possible causes of congestion on this LAN?
Switches increase the number of collision domains in the 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.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Configure the switch so that it has lower priority than other switches in the network

14. By default - which of the following factors determines the spanning-tree path cost?
Show arp and Show interface
A broadcast address will never be the source address of a frame
It is the sum of the costs based on bandwidth
Sequence number - Window size - and Acknowledgment number

15. 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?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Show cdp neighbor detail
Application
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

16. 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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17. Which three of the protocols below belong to the application layer? (Select three answer choices)
SMTP FTP and HTTP
Auto - On - and Desirable
HTTPS - SMTP - and TFTP
The sequence number in the TCP header.

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?
The network layer
Telnet and FTP
802.3ab and 802.3z
Show cdp neighbor detail

19. 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?
This is an Ethernet port operating at half duplex
In an improperly implemented redundant topology
Source Port - Acknowledgment Number - and Window
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

20. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
It is the sum of the costs based on bandwidth
802.1Q and ISL

21. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Packet switching - Packet filtering and Internetwork communication.
SMTP - FTP - HTTP - and HTTPS
All switch and bridge ports are in either the forwarding or blocking state.
Auto - On - and Desirable

22. 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.)
CertK Switch(config)# ip default-gateway 192.168.1.115
MAC Address and Bridge Priority
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.

23. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
Decrease the window size.
Information about a route should never be sent back in the direction from which the original update came.
VTP will allow switches to share VLAN configuration information

24. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
Certkiller B > trace
Increased latency and Filtering of all frame errors
The system is malfunctioning.
An additional broadcast domain will be created.

25. 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?
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
CertK Switch(config)# ip default-gateway 192.168.1.115
All switch and bridge ports are in either the forwarding or blocking state.
A broadcast address will never be the source address of a frame

26. Which layer of the OSI reference model is responsible for ensuring reliable end to end delivery of data?
Switches - Bridges - and Routers
Transport
802.3ab and 802.3z
Buffering - Cut-through - and Congestion avoidance

27. Certkiller users have noticed extremely slow network performance - intermittent connectivity - and connection losses. After entering the 'show interfaces' command - you notice that the Ethernet interface is configured as 100 Mbps full-duplex and that
Duplex mismatch
A cross-over cable
Transport
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

28. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
Layer 4
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
SMTP - FTP - HTTP - and HTTPS
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.

29. 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
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
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.
Decrease the window size.

30. 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
Switches increase the number of collision domains in the network.
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Application

31. 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
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.
Show cdp neighbor detail
100 meters

32. Why is full-duplex Ethernet superior to its single-duplex counterpart?
Encapsulations PPP and authentication CHAP
It operates without collisions and It provides faster data transfer
Application
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.

33. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
SMTP FTP and HTTP
A cross-over cable
Decrease the window size.
Serial0/1 is down - line protocol is down

34. 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
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 sequence number in the TCP header.
A broadcast domain with too many hosts - Broadcast storms - and Low 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

35. Which of the following services use TCP?
SMTP FTP and HTTP
A hub and A repeater.
TCP
Data link

36. 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?
A broadcast address will never be the source address of a frame
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
SMTP FTP and HTTP
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.

37. 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?
The network layer
A cross-over cable
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.
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.

38. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
The sequence number in the TCP header.
Congestion avoidance - Windowing and Buffering
SMTP - FTP - HTTP - and HTTPS
All switch and bridge ports are in either the forwarding or blocking state.

39. 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?
Increased latency and Filtering of all frame errors
It operates without collisions and It provides faster data transfer
An electrical pulse indicates that the collision has cleared.
Show arp and Show interface

40. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Port security
Telnet and FTP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.

41. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
The Bridgeg ID and The bridge priority
Configure the switch so that it has lower priority than other switches in the network
Show cdp neighbor detail
Auto - Desirable - and On

42. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
The system is malfunctioning.
Source Port - Acknowledgment Number - and Window
Serial0/1 is down - line protocol is down

43. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
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.
ARP and ICMP
Packet switching - Packet filtering and Internetwork communication.

44. 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?
Configure the switch so that it has a lower priority than other switches in the network.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
An additional broadcast domain will be created.
Switches - Bridges - and Routers

45. 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.
An additional broadcast domain will be created.
Network
The port is experiencing errors

46. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
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.
Layer 4
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

47. Which of the protocols below use TCP at the transport layer?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
SMTP - FTP - HTTP - and HTTPS
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Path selections and Packet switching.

48. Which of the following can lead to the contribution of LAN traffic congestion?
Hosts use a logical bus topology
Network
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

49. 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?
Packet switching - Packet filtering and Internetwork communication.
It will prevent segment 1's broadcasts from getting to segment 2.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The interfaces must be configured for NAT.

50. What kind of cable should be used to establish a trunked line between two Catalyst switches?
It is used to prevent switching loops in networks with redundant switched routes.
A cross-over cable
Congestion avoidance - Windowing and Buffering
Configure the switch so that it has lower priority than other switches in the network