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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. Which two of the following values does STP take into consideration when it elects the root bridge?
Fiber optic cable.
Information about a route should never be sent back in the direction from which the original update came.
The Bridgeg ID and The bridge priority
Serial0/1 is down - line protocol is down

2. 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?
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
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
100 meters

3. 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
The network layer
VLAN and Swtich
Show arp and Show interface
Packet switching - Packet filtering and Internetwork communication.

4. 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
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
MAC Address and Bridge Priority
Data link
Switches - Bridges - and Routers

5. CK1 is a switch in the Certkiller network. Why will CK1 never learn the broadcast address?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
A broadcast address will never be the source address of a frame
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.
Decrease the window size.

6. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?
Serial0/1 is down - line protocol is down
To prevent switching loops in networks with redundant switched paths.
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth

7. 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?
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.
An additional broadcast domain will be created.
Show cdp neighbor detail
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.

8. 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?
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.
SMTP - FTP - HTTP - and HTTPS
To allow remote management of the switch.
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

9. 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)
Sequence number - Window size - and Acknowledgment number
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Data link
The sequence number in the TCP header.

10. 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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
VTP
Show cdp neighbor detail
The network layer

11. 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
Auto - Desirable - and On
It will prevent segment 1's broadcasts from getting to segment 2.
VTP
Duplex mismatch

12. Why is full-duplex Ethernet superior to its single-duplex counterpart?
It operates without collisions and It provides faster data transfer
Port security
SMTP - FTP - HTTP - and HTTPS
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth

13. 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?
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.
Layer 3
Network
Switches increase the number of collision domains in the network.

14. 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
STP
802.3ab and 802.3z

15. Which Layer 4 protocol is used for a Telnet connections between two CK routers?
SMTP - FTP - HTTP - and HTTPS
TCP
The switch will forward the frame to a specific port
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

16. Which of the following are types of flow control?
This is an Ethernet port operating at half duplex
Configure the switch so that it has lower priority than other switches in the 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
Buffering - Cut-through - and Congestion avoidance

17. 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?
Auto - On - and Desirable
Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
An additional broadcast domain will be created.
A cross-over cable

18. Which of the following correctly describe the various functions and virtues of a router?
Packet switching - Packet filtering and Internetwork communication.
Network
Switches increase the number of collision domains in the network.
Hosts use a logical bus topology

19. By default - which of the following factors determines the spanning-tree path cost?
Information about a route should never be sent back in the direction from which the original update came.
It is the sum of the costs based on bandwidth
A broadcast domain with too many hosts - Broadcast storms - and Low bandwidth
An electrical pulse indicates that the collision has cleared.

20. ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets?
STP
They can provide hosts with information about network problems. and They are encapsulated within IP datagrams.
Configure the switch so that it has a lower priority than other switches in the network.
ARP and ICMP

21. 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?
Increased latency and Filtering of all frame errors
Auto - On - and Desirable
Certkiller B > trace
VTP

22. Which of the following are spanning tree port states?
Learning - Listening - and Forwarding
Hosts use a logical bus topology
MAC Address and Bridge Priority
VLAN and Swtich

23. 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
The interfaces must be configured for NAT.
Packet switching - Packet filtering and Internetwork communication.
802.3ab and 802.3z

24. What is the IEEE standard associated with Gigabit Ethernet?
Show arp and Show interface
802.3ab and 802.3z
A hub and A repeater.
Configure the switch so that it has lower priority than other switches in the network

25. 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.
Network
Hosts use a logical bus topology
It is the sum of the costs based on bandwidth

26. At which OSI layer is a logical path created between two host systems named CK1 and CK2 on the Certkiller LAN?
Learning - Listening - and Forwarding
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.
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.
Network

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?
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
This is an Ethernet port operating at half duplex
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.

28. 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
Network
It is used to prevent switching loops in networks with redundant switched routes.
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
The port is experiencing errors

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?
All switch and bridge ports are in either the forwarding or blocking state.
CertK Switch(config)# ip default-gateway 192.168.1.115
Sequence number - Window size - and Acknowledgment number
ARP and ICMP

30. What is the purpose of the spanning-tree algorithm in a switched LAN?
Source Port - Acknowledgment Number - and Window
Switches - Bridges - and Routers
To prevent switching loops in networks with redundant switched paths.
SMTP FTP and HTTP

31. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
It will prevent segment 1's broadcasts from getting to segment 2.
VTP
Port security

32. 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?
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.
Decrease the window size.
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
CertK Switch(config)# ip default-gateway 192.168.1.115

33. When you compare the differences between half-duplex and full-duplex Ethernet - which of the following characteristics are exclusive to half-duplex?
The interfaces must be configured for NAT.
Auto - On - and Desirable
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
Half-duplex Ethernet operates in a shared collision domain. and Half-duplex Ethernet has lower effective throughput.

34. You need to perform some initial configuration tasks on a new Certkiller switch. What are the possible trunking modes for this switch port?
A broadcast address will never be the source address of a frame
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Switches increase the number of collision domains in the network.
Auto - On - and Desirable

35. 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?
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
Network
ARP and ICMP
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.

36. 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?
The switch will forward the frame to a specific port
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
It is the sum of the costs based on bandwidth
A hub and A repeater.

37. Which of the following devices can the Certkiller network administrator use to segment the LAN?
A hub and A repeater.
Layer 4
Layer 3
Switches - Bridges - and Routers

38. Which of the following commands would be applied to a WAN interface - but not on LAN Interface?
Encapsulations PPP and authentication CHAP
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.
The Bridgeg ID and The bridge priority
CertK Switch(config)# ip default-gateway 192.168.1.115

39. Two stations on the Certkiller LAN transmit at the same time - resulting in a collision. What happens when a collision occurs on the network?
Layer 4
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.
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.
VTP will allow switches to share VLAN configuration information

40. 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.
Application
A broadcast address will never be the source address of a frame
Device Identifiers - Capabilities list - Platform
Fiber optic cable.

41. 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?
A switch is a multiport bridge and Bridges and switches learn Mac addresses by examining the source MAC address of each frame received.
The switch will forward the frame to a specific port
Switches increase the number of collision domains in the network.
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses

42. 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?
This is an Ethernet port operating at half duplex
Device Identifiers - Capabilities list - Platform
Layer 4
Configure the switch so that it has a lower priority than other switches in the network.

43. Cisco is the leader in the router market space. What basic functions do their routers perform in a network?
ARP and ICMP
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Path selections and Packet switching.
Layer 4

44. Which fields are included in the TCP header?
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
Half-duplex Ethernet uses a loopback circuit to detect collisions. and Full-duplex Ethernet makes use of two pairs of wires for data.
Layer 3

45. 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?
Application
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.
Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth
SMTP - FTP - HTTP - and HTTPS

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?
Allowing simultaneous frame transmissions and filtering frames based on MAC addresses
VTP will allow switches to share VLAN configuration information
Filtering can occur based on Layer 3 information and Broadcasts are not forwarded across the router
Too many hosts in a broadcast domain - Broadcast storms and Low bandwidth

47. Which of the protocols below - operates at Layer 2 of the OSI model - and is used to maintain a loop-free network?
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
STP
A CSU/DSU terminates a digital local loop - A modem terminates an analog local loop - A router is commonly considered a DTE device.
HTTPS - SMTP - and TFTP

48. 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
Telnet and FTP
Data link
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.

49. Which of the following services use TCP?
SMTP FTP and HTTP
The switch receives the complete frame before beginning to forward it. and Latency through the switch varies with frame length
UDP will pass the information in the datagrams up to the next OSI layer in the order that they arrive.
All switch and bridge ports are in either the forwarding or blocking state.

50. Which three of the protocols below belong to the application layer? (Select three answer choices)
Increased latency and Filtering of all frame errors
802.1Q and ISL
Configure the switch so that it has lower priority than other switches in the network
HTTPS - SMTP - and TFTP