Test your basic knowledge |

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. In a switched LAN network - What is the Spanning-Tree algorithm used for?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
It operates without collisions and It provides faster data transfer
VTP will allow switches to share VLAN configuration information
It is used to prevent switching loops in networks with redundant switched routes.

2. 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.
Certkiller B > trace
To allow remote management of the switch.
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

3. 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)
HTTPS - SMTP - and TFTP
Fiber optic cable.
The system is malfunctioning.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

4. Which of the following are types of flow control?
Serial0/1 is down - line protocol is down
In an improperly implemented redundant topology
TCP
Buffering - Cut-through - and Congestion avoidance

5. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Auto - Desirable - and On
The interfaces must be configured for NAT.
VTP
Auto - On - and Desirable

6. 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?
Configure the switch so that it has lower priority than other switches in the network
The port is experiencing errors
To prevent switching loops in networks with redundant switched paths.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

7. Which OSI layer is associated with the following: The acknowledgment of transmissions - sequencing - and flow control across a network?
An electrical pulse indicates that the collision has cleared.
Layer 4
Layer 3
100 meters

8. At which layer of the OSI model does the protocol that provides the information displayed by the 'show cdp neighbors' command operate?
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
Congestion avoidance - Windowing and Buffering
Data link

9. 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.
The system is malfunctioning.
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Switches - Bridges - and Routers

10. Which OSI layer header contains the address of a destination host that is on another network?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Network
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router

11. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
HTTPS
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
VTP will allow switches to share VLAN configuration information
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

12. 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 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.
An additional broadcast domain will be created.
STP

13. 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
VLAN and Swtich
Auto - On - and Desirable
STP
Duplex mismatch

14. 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?
Layer 3
802.3ab and 802.3z
Decrease the window size.
HTTPS - SMTP - and TFTP

15. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Physical Layer and Datalink Layer
The system is malfunctioning.
Duplex mismatch
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.

16. 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.
Data link
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.

17. 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?
To prevent switching loops in networks with redundant switched paths.
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

18. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
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 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.
Encapsulations PPP and authentication CHAP
A cross-over cable

19. 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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20. Which of the following can lead to the contribution of LAN traffic congestion?
Device Identifiers - Capabilities list - Platform
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Switches - Bridges - and Routers
The switch will forward the frame to a specific port

21. 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 sequence number in the TCP header.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
MAC Address and Bridge Priority
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

22. 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?
It is used to prevent switching loops in networks with redundant switched routes.
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 hub and A repeater.
This is an Ethernet port operating at half duplex

23. 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?
Hosts use a logical bus topology
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.
This is an Ethernet port operating at half duplex

24. 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.
VTP
Increased latency and Filtering of all frame errors
SMTP - FTP - HTTP - and HTTPS

25. 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 increase the number of collision domains in the network.
The network layer
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

26. 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
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.
Fiber optic cable.
Application
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.

27. 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.
In an improperly implemented redundant topology
Application
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
Increased latency and Filtering of all frame errors

28. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Switches - Bridges - and Routers
Fiber optic cable.
Encapsulations PPP and authentication CHAP
Application

29. What is the IEEE standard associated with Gigabit Ethernet?
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
Physical Layer and Datalink Layer
802.3ab and 802.3z
Data link

30. 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.
Show cdp neighbor detail
Auto - On - and Desirable
Packet switching - Packet filtering and Internetwork communication.

31. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Data link
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
The Bridgeg ID and The bridge priority
Auto - Desirable - and On

32. Which fields are included in the TCP header?
802.3ab and 802.3z
The Bridgeg ID and The bridge priority
Source Port - Acknowledgment Number - and Window
Show cdp neighbor detail

33. By default - which of the following factors determines the spanning-tree path cost?
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.
To prevent switching loops in networks with redundant switched paths.
The network layer
It is the sum of the costs based on bandwidth

34. 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
Telnet and FTP
Show arp and Show interface
The system is malfunctioning.

35. You need to perform some initial configuration tasks on a new Certkiller switch. What is the purpose of assigning an IP address to a switch?
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
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.
It will prevent segment 1's broadcasts from getting to segment 2.

36. 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
It operates without collisions and It provides faster data transfer
CertK Switch(config)# ip default-gateway 192.168.1.115
The sequence number in the TCP header.
Source Port - Acknowledgment Number - and Window

37. 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
A cross-over cable
Data link
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
Learning - Listening - and Forwarding

38. Why is full-duplex Ethernet superior to its single-duplex counterpart?
VLAN and Swtich
It operates without collisions and It provides faster data transfer
Network
A hub and A repeater.

39. 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.
Configure the switch so that it has lower priority than other switches in the network
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Transport

40. 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?
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.
HTTPS
Packet switching - Packet filtering and Internetwork communication.
Transport

41. 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?
802.3ab and 802.3z
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
VLAN and Swtich
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

42. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
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.
Path selections and Packet switching.

43. 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
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Application
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length

44. 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?
HTTPS
Layer 4
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Port security

45. 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?
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.
Source Port - Acknowledgment Number - and Window
Path selections and Packet switching.
Configure the switch so that it has a lower priority than other switches in the network.

46. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
A broadcast address will never be the source address of a frame
Packet switching - Packet filtering and Internetwork communication.
ARP and ICMP
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

47. 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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Show arp and Show interface
The sequence number in the TCP header.
CertK Switch(config)# ip default-gateway 192.168.1.115

48. With regard to Ethernet media access methods - which of the following are true?
SMTP FTP and HTTP
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.
VTP will allow switches to share VLAN configuration information
TCP

49. 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?
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Buffering - Cut-through - and Congestion avoidance
The switch will forward the frame to a specific port

50. Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
VTP
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 port is experiencing errors