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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 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?
It operates without collisions and It provides faster data transfer
An additional broadcast domain will be created.
Encapsulations PPP and authentication CHAP
It is used to prevent switching loops in networks with redundant switched routes.

2. Acknowledgements - sequencing - and flow control are functions that are handled by which layer of the OSI model?
Switches increase the number of collision domains in the network.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Layer 4
Source Port - Acknowledgment Number - and Window

3. Which fields are included in the TCP header?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
ARP and ICMP
A broadcast address will never be the source address of a frame
Source Port - Acknowledgment Number - and Window

4. 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?
In an improperly implemented redundant topology
Configure the switch so that it has a lower priority than other switches in the network.
Application
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

5. 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 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
Decrease the window size.
An electrical pulse indicates that the collision has cleared.
A hub and A repeater.

6. Which three statements are true about the operation of a full-duplex Ethernet network - which is being used in the Certkiller LAN?
Information about a route should never be sent back in the direction from which the original update came.
MAC Address and 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.
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

7. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
Path selections and Packet switching.
This is an Ethernet port operating at half duplex
Hosts use a logical bus topology
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.

8. 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?
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
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
Sequence number - Window size - and Acknowledgment number

9. Certkiller has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
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.
VTP will allow switches to share VLAN configuration information
Encapsulations PPP and authentication CHAP
Packet switching - Packet filtering and Internetwork communication.

10. 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.
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
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The network layer

11. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
SMTP FTP and HTTP
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.
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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.

12. 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.
Certkiller B > trace
Show arp and Show interface
The network layer

13. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
Encapsulations PPP and authentication CHAP
Auto - On - and Desirable
VLAN and Swtich
The sequence number in the TCP header.

14. 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?

15. Which of the following correctly describe steps in the OSI date encapsulation process?
The network layer
Auto - Desirable - and On
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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.

16. 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
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.
This is an Ethernet port operating at half duplex
802.1Q and ISL

17. 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?
A broadcast address will never be the source address of a frame
Network
Show cdp neighbor detail
Configure the switch so that it has a lower priority than other switches in the network.

18. 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 interfaces must be configured for NAT.
802.3ab and 802.3z
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
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.

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 port is experiencing errors
Network
To prevent switching loops in networks with redundant switched paths.
It is used to prevent switching loops in networks with redundant switched routes.

20. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
Source Port - Acknowledgment Number - and Window
This is an Ethernet port operating at half duplex
The port is experiencing errors
STP

21. 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
To prevent switching loops in networks with redundant switched paths.
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.
To allow remote management of the switch.

22. 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
VTP will allow switches to share VLAN configuration information
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
Data link

23. 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
Layer 4
The network layer
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

24. In a switched LAN network - What is the Spanning-Tree algorithm used for?
A hub and A repeater.
Auto - Desirable - and On
Path selections and Packet switching.
It is used to prevent switching loops in networks with redundant switched routes.

25. 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?
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
Show cdp neighbor detail
Network
Packet switching - Packet filtering and Internetwork communication.

26. 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 is used to prevent switching loops in networks with redundant switched routes.
Fiber optic cable.
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 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

27. 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.
Hosts use a logical bus topology
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
It operates without collisions and It provides faster data transfer

28. The system LED is amber on a new Certkiller Catalyst 2950 series switch. What does this indicate?
It will prevent segment 1's broadcasts from getting to segment 2.
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Data link
The system is malfunctioning.

29. When a switch port is used as a VLAN trunk - which of the following trunk modes are valid?
Auto - Desirable - and On
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
TCP
Layer 4

30. Which of the following are spanning tree port states?
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
Buffering - Cut-through - and Congestion avoidance
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Learning - Listening - and Forwarding

31. Which two statements describe the operation of the CSMA/CD access method - which is in use on the Certkiller network?
Port security
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.
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
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

32. 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
Data link
VLAN and Swtich
The sequence number in the TCP header.
VTP

33. 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
Switches increase the number of collision domains in the network.
STP
Configure the switch so that it has lower priority than other switches in the network

34. 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
Switches increase the number of collision domains in the network.
Data link
A cross-over cable
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth

35. 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?
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.
SMTP FTP and HTTP
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Certkiller B > trace

36. What kind of cable should be used to establish a trunked line between two Catalyst switches?
The network layer
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
A cross-over cable
Layer 4

37. Which of the following devices can the Certkiller network administrator use to segment the LAN?
Source Port - Acknowledgment Number - and Window
Increased latency and Filtering of all frame errors
VLAN and Swtich
Switches - Bridges - and Routers

38. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Switches increase the number of collision domains in the network.
Network
Auto - On - and Desirable
CertK Switch(config)# ip default-gateway 192.168.1.115

39. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
Network
Sequence number - Window size - and Acknowledgment number
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Serial0/1 is down - line protocol is down

40. Which of the following can lead to the contribution of LAN traffic congestion?
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
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
Telnet and FTP

41. 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?
Serial0/1 is down - line protocol is down
All switch and bridge ports are in either the forwarding or blocking state.
An electrical pulse indicates that the collision has cleared.
Path selections and Packet switching.

42. When comparing and contrasting the similarities and differences between bridges and switches - which of the following are valid statements?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
A cross-over cable
Application
VLAN and Swtich

43. 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
To allow remote management of the switch.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
Source Port - Acknowledgment Number - and Window
To prevent switching loops in networks with redundant switched paths.

44. Which of the protocols below use TCP at the transport layer?
Buffering - Cut-through - and Congestion avoidance
The Bridgeg ID and The bridge priority
SMTP - FTP - HTTP - and HTTPS
Network

45. Assuming you build networks to exact specifications - What is the recommended maximum length a 10BaseT cable can be before it has to be segmented or repeated?
100 meters
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.
Switches increase the number of collision domains in the network.

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?
MAC Address and Bridge Priority
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
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.
Configure the switch so that it has lower priority than other switches in the network

47. What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
All switch and bridge ports are in either the forwarding or blocking state.
Physical Layer and Datalink Layer

48. Which of the following services use TCP?
An electrical pulse indicates that the collision has cleared.
SMTP FTP and HTTP
Telnet and FTP
It is used to prevent switching loops in networks with redundant switched routes.

49. Which protocol uses TCP port 443 at layer 4?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
Certkiller B > trace
HTTPS
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.

50. By default - which of the following factors determines the spanning-tree path cost?
VTP will allow switches to share VLAN configuration information
The Bridgeg ID and The bridge priority
It is the sum of the costs based on bandwidth
Hosts use a logical bus topology