Chapter 6

What is the proper CIDR prefix notation for a subnet mask of 255.0.0.0? /8 /16 /24 /32

/8

A device has been assigned the IPv6 address of 2001:0db8:cafe:4500:1000:00d8:0058:00ab/64. Which is the host identifier of the device? 2001:0db8:cafe:4500:1000:00d8:0058:00ab 2001:0db8:cafe:4500 1000:00d8:0058:00ab 00ab

1000:000d8:0058:00ab

What is the correct compressed format of the IPv6 address 2001:0db8:eeff:000a:0000:0000:0000:0001? 2001:db8:eeff:a::1 2001:db8:eeff:a:1 2001:db8:eeff:a::0001 2001:db8:eeff:a:::1

2001:db8:eeff:a::1

How many bits are used to represent the OUI part of the MAC address of a NIC card? 24 8 128 42

24

How many bits are used to represent a MAC address? 48 8 128 64

48

How many bits are used to represent the host address of a computer with the IP address of 192.168.1.25 and a subnet mask of 255.255.255.0? 8 128 32 4

8

How many bits are used to represent the host address of a computer with the IP address of 192.168.1.25 and a subnet mask of 255.255.255.0? 8 48 32 12

8

The current IP configuration of a small company is done manually and is time-consuming. Because of increased network growth, a technician needs a simpler way for IP configuration of workstations. Which service would simplify the workstation IP configuration task? APIPA DHCP DIPS ICMP

DHCP

Which protocol dynamically assigns IP addresses to network devices? Select one: DHCP TCP DNS RARP ICMP

DHCP

How many bits are used to represent an IPv6 address? 128 48 32 12

128

How many bits are used to represent the network address of a host with an IP address of 192.168.150.16 and a subnet mask of 255.255.0.0? 16 128 32 4

16

How many bits are used to represent the network address of a host with an IP address of 192.168.150.16 and a subnet mask of 255.255.0.0? 16 128 32 42

16

A device has been assigned the IPv6 address of 2001:0db8:cafe:4500:1000:00d8:0058:00ab/64. Which is the network identifier of the device? Select one: 2001:0db8:cafe:4500 2001:0db8:cafe:4500:1000:00d8:0058:00ab 2001 2001:0db8:cafe:4500:1000 1000:00d8:0058:00ab

2001:0db8:cafe:4500

Which IPv6 address represents the most compressed form of the IPv6 address 2001:0db8:cafe:0000:0835:0000:0000:0aa0/80? 2001:0db8:cafe:0000:0835::0aa0/80 2001:db8:cafe:0000:0835::aa0/80 2001:0db8:cafe:0000:0835::0aa/80 2001:db8:cafe::0835::aa0/80 2001:db8:cafe:0:835::aa0/80

2001:db8:cafe:0:835::aa0/80

Port triggering has been configured on a wireless router. Port 25 has been defined as the trigger port and port 113 as an open port. What effect does this have on network traffic? Any traffic that comes into port 25 allows outgoing port 113 to be used. All traffic that is sent into port 25 to the internal network will also be allowed to use port 113. Any traffic that is using port 25 going out of the internal network will also be allowed to transmit out port 113. All traffic that is sent out port 25 will open port 113 to allow inbound traffic into the internal network through port 113.

All traffic that is sent out port 25 will open port 113 to allow inbound traffic into the internal network through port 113.

An administrator deploys wireless access points across the office to provide wireless network connectivity to users. Each workstation receives an IP address via DHCP. After a file server with a static IP is connected to the wired network, the administrator receives an IP address conflict message. What is a possible solution? Restart the DHCP server. Change the IP address of the file server with the ipconfig /release and ipconfig /renew commands. Change the static IP configured on the file server. Connect the file server to the wireless network.

Change the static IP configured on the file server.

Which network protocol is used to automatically assign an IP address to a computer on a network? FTP DHCP ICMP SMTP APIPA

DCHP

A network technician is checking a computer to see if the DHCP client is working correctly. The technician issues the ipconfig /all command. Which two parameters should the technician review? (Choose two.) description default gateway host name media state subnet mask

Default gateway and subnet mask

A wired network is undergoing several changes that could leave it vulnerable to connection by unauthorized devices while the work is in progress. Which two temporary measures would enable the authorized devices to continue to have network access but prevent unauthorized devices from connecting? (Choose two.) Disable DNS. Disable SSID broadcast. Disable DHCP. Subnet the network. Assign static IP addresses to the authorized devices.

Disable DCHP. Assign static IP addresses to the authorized devices.

After having talked to the customer, a network technician suspects that an invalid IP address is the most likely cause of a network issue. Which step of the troubleshooting process does this represent? Identify the problem. Test the theory to determine the cause. Establish a theory of probable cause. Establish a plan of action to resolve the problem and implement the solution.

Establish a theory of probable cause.

Which protocol is used by ping to test connectivity between network hosts? Select one: TCP DHCP ARP ICMP

ICMP

What security technique could provide secure access to a server located in a small office without the expense of implementing a DMZ or purchasing a hardware firewall? implement hash encoding for all wireless devices implement MAC address filtering implement port forwarding implement basic security on all wireless access points

Implement port forwarding

A computer is assigned an IP address of 169.254.33.16. What can be said about the computer, based on the assigned address? Select one: It can communicate with networks inside a particular company with subnets. It cannot communicate outside its own network. It can communicate on the local network as well as on the Internet. It has a public IP address that has been translated to a private IP address.

It cannot communicate outside its own network

Which filtering method uses the physical address to specify exactly which device is allowed or blocked from sending data on a network? MAC address filtering port forwarding port triggering whitelisting

MAC address filtering

Multiple users report that the workstations are assigned a 169.254.x.x IP address. The users are able to communicate only between each other. What is a possible solution? Restart the DNS server. Statically configure a default gateway on each workstation. Verify the network cable on all user machines. Restart the DHCP server.

Restart the DHCP server

A group of users is unable to connect to the network. When testing several of the PCs and issuing the command ipconfig , the technician notices that all of them have an IP address in the 169.254.x.x range. What is the most likely cause of this problem? The DHCP server is not operational. The gateway address is incorrect. The DNS server is not operational. The Internet connection is down.

The DHCP server is not operational.

A group of users is unable to connect to the network. When testing several of the PCs and issuing the command ipconfig, the technician notices that all of them have an IP address in the 169.254.x.x range. What is the most likely cause of this problem? The Internet connection is down. The DHCP server is not operational. The gateway address is incorrect. The DNS server is not operational.

The DHCP server is not operational.

What is the problem if a computer automatically configures an IP address in the 169.254.x.x address range? Select one: The DHCP server is unreachable. The DNS server is unreachable. The computer is configured with an incorrect default gateway. The computer NIC is disabled.

The DHCP server is unreachable.

Which network server is malfunctioning if a user can ping the IP address of a web server but cannot ping the web server host name? the DNS server the DHCP server the FTP server the HTTP server

The DNS server

A user can print to a printer that is on the same network, but the traffic of the user cannot reach the Internet. What is a possible cause of the problem? The PC default gateway address is missing or incorrect. The PC has an incorrect IP address. The network cable connected to the user PC is faulty. The NIC on the PC is faulty.

The PC default gateway address is missing or incorrect.

What two default wireless router settings can affect network security? (Choose two.) The SSID is broadcast. MAC address filtering is enabled. WEP encryption is enabled. The wireless channel is automatically selected. A well-known administrator password is set.

The SSID id broadcast. The well-known administrator password is set.

A technician is troubleshooting a problem where the user claims access to the Internet is not working, but there was access to the Internet the day before. Upon investigation, the technician determines that the user cannot access the network printer in the office either. The network printer is on the same network as the computer. The computer has 169.254.100.88 assigned as an IP address. What is the most likely problem? The computer cannot communicate with a DHCP server. The IP default gateway on the computer is incorrect. The network interface card driver needs to be updated. The router that connects this network to other networks is down.

The computer cannot communicate with a DCHP server.

A new computer workstation has been installed in a small office. The user of the workstation can print a document using a network printer on the LAN, but cannot access the Internet. What is a possible cause of the problem? Select one: The DHCP server IP address is misconfigured. The workstation is configured with a static IP address. The gateway IP address is misconfigured. The TCP/IP stack is not functional.

The gateway IP address is misconfigured.

A PC is not able to connect to a wired network. Pinging the loopback address is successful, but the gateway cannot be reached. On the network switch all the interface lights are on, except for the interface connected to the PC. The LED on the network card is off. What is the most likely cause of this problem? The gateway needs to be fixed. The network cable is faulty. The network switch is faulty. The PC has an incorrect IP address for the DNS server.

The network cable is faulty.

A user reports that the corporate web server cannot be accessed. A technician verifies that the web server can be accessed by its IP address. What are two possible causes of the problem? (Choose two.) Select one or more: The web server information is misconfigured on the DNS server. The DNS server address is misconfigured on the workstation. The network connection is down. The default gateway address is misconfigured on the workstation. The web server is misconfigured.

The web server information is misconfigured on the DNS server. The DNS server address is misconfigured on the workstation.

A technician wishes to update the NIC driver for a computer. What is the best location for finding new drivers for the NIC? Select one: the website for the manufacturer of the NIC the website for Microsoft the installation media for Windows the installation media that came with the NIC Windows Update

The website for the manufacturer of the NIC

A wireless router is displaying the IP address of 192.168.0.1. What could this mean? Select one: Dynamic IP address allocation has been configured on the router and is functioning correctly. The wireless router still has the factory default IP address. The NAT function is not working on the wireless router. The wireless router has been configured to use the frequencies on channel 1.

The wireless router still has the factory default IP address.

A workstation has been moved from the first floor to the fifth floor within an organization. The user is now reporting that the workstation cannot connect to the network. A technician suspects that the workstation could not obtain an IP address from a DHCP server. What is a possible cause of the problem? An IP address conflict occurred. The DHCP server is misconfigured. The workstation has been configured with a static IP address. The default gateway address is misconfigured on the workstation.

The workstation has been configured with a static IP address.

Users in a recently installed wireless network are complaining of slow data transfer and frequent loss of connectivity. The technician checks that the wireless security is correctly implemented, and there is no evidence of unauthorized users on the network. Which two problems might the technician suspect? (Choose two.) There is interference from outside sources. The DHCP server is faulty. The wireless signal is too weak. The antenna on the access point is too powerful. The network passwords need to be reissued to the users.

There is interference from outside sources. The wireless signal is too weak.

What is a result when the DHCP servers are not operational in a network? Select one: Workstations are assigned with IP addresses in the 10.0.0.0/8 network. Workstations are assigned with IP addresses in the 169.254.0.0/16 network. Workstations are assigned with the IP address 0.0.0.0. Workstations are assigned with the IP address 127.0.0.1. Feedback

Workstation are assigned with the IP address in the 169.254.0.0/16 network.

A computer has been assigned an IP address of 169.254.33.16. What command initiates the process of requesting a new IP address? Select one: net computer ipconfig /release tracert nslookup

ipconfig/release

A technician troubleshooting a network problem has used CLI commands to determine that a computer has not been allocated a correct IP address from the DHCP server. Which command can the technician use to solve this problem? ping ipconfig/release tracert ipconfig/renew

ipconfig/renew

What command can be used to troubleshoot domain name resolution issues? Select one: get nslookup arp -a tracert

nslookup

A customer has a web server for a small business. The business uses both wired and wireless networking. A Linksys WRT300N wireless router provides wireless and wired connectivity. What firewall option may be enabled in order for customers to gain access to the web server from their remote locations? Select one: port triggering MAC address filtering WEP WPA2 port forwarding

port forwarding

A technician is configuring the channel on a wireless router to either 1, 6, or 11. What is the purpose of adjusting the channel? to disable broadcasting of the SSID to enable different 802.11 standards to provide stronger security modes to avoid interference from nearby wireless devices

to avoid interference from nearby wireless devices

Which filtering method uses IP addresses to specify allowed devices on your network? Select one: port triggering blacklisting port forwarding whitelisting MAC address filtering

whitelisting