1.3 Install and configure the following networking services/applications
"Which of the following can be used to set options such as TFTP server addresses, DNS search lists, and broadcast addresses on network clients and workstations?"
"DHCP server"
"Which of the following is not a feature of a proxy server?"
"It can convert a nonroutable protocol to a routable protocol."
"You receive a call on Monday morning that several computers will not connect to the network. You determine that the computers left on over the weekend are functional, but those that were turned off over the weekend are not functioning. What is the most likely source of the problem?"
"DHCP is not functioning." "You should consider making use of the Dynamic Host Configuration Protocol (DHCP) protocol since DHCP is responsible for automating the assignment of IP configurations to computer systems on a TCP/IP network."
"Which of the following BEST describes the definition of DHCP?"
"DHCP is used to dynamically lease IP addresses to hosts." "A DHCP server maintains a database of available IP addresses and configuration information. When the DHCP server receives a request from a client, it determines the network to which the DHCP client is connected, it allocates an IP address or prefix that is appropriate for the client, and then sends the configuration information appropriate for that client."
"There are two items that are always contained in a DHCPOFFER message. What is one of them?"
"DHCP lease information" "A DHCPOFFER message always contains the DHCP lease information. It also contains the IP address and subnet mask being offered as well as the IP address of the DHCP server itself."
"Which of the following defines the amount of time a host retains a specific IP address before it is renewed or released?"
"DHCP lease" "By default, each IP address assigned by a DHCP Server comes with a one-day lease, which is the amount of time that the IP address is valid."
"Which mechanism can be used by DHCP servers to deliver configuration information, such as the default gateway router address and DNS server addresses, to DHCP client systems?"
"DHCP option" "You can use DHCP options with your DHCP server to deliver a wide variety of configuration parameters to DHCP clients. For example, you can deliver the IP address of the default gateway router, the IP address of your DNS server, the IP address of your WINS server, and so on."
"Discover, Offer, Request, and Acknowledge (also known as the dora process) are the steps for which of the following protocols?"
"DHCP" "The dora process steps are: Discover. Offer. Request. Acknowledge. 1. DHCP automatically discovers the system 2. Server sends offer to the client system 3. Client sends request to the server system 4. An Acknowledgement is send by server to client system."
"You installed a basic router for your SOHO network. After installing the router, the PCs connected to it are not able to acquire an IP address. What still needs to be configured?"
"DHCP" "You need to configure the Dynamic Host Configuration Protocol (DHCP) protocol since DHCP is responsible for automating the assignment of IP configurations to computer systems on a TCP/IP network."
"Which type of server in your network uses pointer and A records?"
"DNS Server" "A DNS server uses many types of records. An ""A" record is a hostname to IP address record and a pointer record is an IP address to hostname record."
"You can successfully remote into the company's server, however, you cannot connect to any of the other servers directories from the server itself, but can ping them via an IP address. Which of the following could be the problem?"
"DNS is not correctly configured." "You use DNS to add, edit, or remove DNS server addresses and adjust the order in which they will be queried. "
"None of the users in your office can connect to the servers using the FQDN. What is the most likely cause of the problem?"
"DNS is not enabled" "A Fully Qualified Domain Name (FQDN) is the type of name that you use when surfing the Web. It consists of a top-level domain name, such as .com, for example, preceded by a second-level domain name, such as CompTIA, preceded by a server name or subdomain string, such as www. "
"Which of the following network protocols is used to resolve FQDN's to IP addresses?"
"DNS" "DNS translates domain names into IP addresses. Domain names are easy to remember since they're alphabetic ( for example: www.google.com ). The Internet however, is based on IP addresses. Every time you use a domain name, a DNS service must translate the name into the corresponding IP address. Google uses many IP address ranges. 64.233.160.0 - 64.233.191.255 is one of their many ranges."
"A user reports that the entire office is unable to access the Internet. The error message says, ""When attempting to connect, an error on port 53 has occurred"". What is not working?"
"DNS" "Port 53 is used by the Domain Naming System for queries and name resolution."
"Which one of the following features would you expect to find on a DHCP server?"
"Dynamic IP addressing" "Use the Dynamic Host Configuration Protocol (DHCP) protocol since DHCP is responsible for automating the assignment of IP configurations to computer systems on a TCP/IP network."
"You need to use an IP addressing method that will not require manual updating. What method will you use?"
"Dynamic" "You should make use of the Dynamic Host Configuration Protocol (DHCP) protocol since DHCP is responsible for automating the assignment of IP configurations to computer systems on a TCP/IP network."
"You are not able to ping a server by the FQDN, but you can by using the IP address. Which of the following should the you check?"
"Ensure that the DNS is configured" "DNS is an essential part of any TCP/IP network because it simplifies the task of remembering addresses; all you have to do is simply remember the host name and domain name. You should also check the DNS configuration by using command prompt. C:\>ipconfig/all"
"Which of the following DNS records is used to identify a domain's SMTP server?"
"MX" "Mail exchanger (MX) records are used to resolve IP addresses for an e-mail server. The set of MX records of a domain name specifies how email should be routed with the Simple Mail Transfer Protocol (SMTP)"
"Which type of DNS record resolves an IP address into a hostname instead of a hostname into an IP address?"
"PTR record" "PTR records are used in the opposite fashion of A records. Instead of resolving a hostname into an IP address, a PTR record resolves an IP address into its corresponding host name."
"A reserved set of IP addresses in a DHCP scope is commonly assigned to two network devices. What is one of them?"
"Printer"
"Several pieces of information are contained within an SOA record in a primary DNS server zone. What is one of them?"
"Refresh time" "An SOA record contains, among other things, the zone's refresh time parameter. The refresh time specifies how many seconds a secondary DNS server waits before querying the primary DNS server's SOA record to check for changes."
"Under a DHCP server Scope Options, what configuration would you use so that a host always receives the same IP address?"
"Reservation list" "You would use this reservation list for routers or servers if they were not statically assigned. However, you can use reservations lists for any host on your network as well."
"In order to limit the number of dynamic addresses of hosts on a network, which of the following can be implemented?"
"Reservations" "DHCP Reservation is used to assign a fixed IP Address to a device that always requires the same IP Address every time it is in use. This feature can be used for a print server, IP Camera, or a Network storage device as well as a computer."
"Which of the following properties of DHCP are use to ensure an IP address is not leased out from the active scope?"
"Reservations" "Reservations are permanent lease assignments that are used to ensure that a specified client on a subnet can always use the same IP address. You can use DHCP reservations for hosts that require a consistent IP address, but do not need to be statically configured. "
"Which type of DNS zone contains PTR records?"
"Reverse-lookup zone" "Reverse-lookup zones contain PTR records, which are used to resolve IP addresses into hostnames in the zone. A reverse-lookup zone is tied to a standard forward lookup zone. They are named using the reverse network IP address used by the zone. For example, if the network address of the zone is 192.168.20.0, the name of the reverse-lookup zone would be 20.168.192.in-addr.arpa."
"Which of the following DHCP properties defines the size of the pool of available IP addresses?"
"Scope" "DHCP scope is a valid range of IP addresses that are available for assignment or lease to client computers on a particular subnet. In a DHCP server, a scope is configured to determine the address pool of IPs that the server can provide to DHCP clients."
"Several pieces of information are contained within an SOA record in a primary DNS server zone. What is one of them?"
"Serial number" "An SOA record contains, among other things, the zone's serial number. The serial number is really a revision number for the zone file. The serial number is incremented each time the zone file is modified. Whenever the serial number for a primary zone is incremented, it tells any secondary servers for the zone that they need to update themselves with the new zone information."
"A reserved set of IP addresses in a DHCP scope is commonly assigned to two network devices. What is one of them?"
"Server"
"Which one of the following features would you expect to find on a DHCP server?"
"Static IP address reservations" "Use the Dynamic Host Configuration Protocol (DHCP) protocol since DHCP is responsible for automating the assignment of IP configurations to computer systems on a TCP/IP network."
"There are two items that are always contained in a DHCPOFFER message. What is one of them?"
"The DHCP client's MAC address" "A DHCPOFFER message always contains the DHCP client's MAC address. It also contains the IP address and subnet mask being offered as well as the IP address of the DHCP server itself."
"A DHCP enabled computer on the network has been unplugged from the network for a week. In the mean time, several other computers were added to the network. When plugging the computer back into the network, the computer is unable to reach network resources. Which of the following is the most likely cause?"
"The DHCP pool limit has been reached. "
"Your workstation is configured to use DHCP to get its IP addressing information. When you boot the system and the operating system loads, it sends out a DHCPDISCOVER broadcast on the network. What happens next?"
"The DHCP server receives the message and responds with a DHCPOFFER to the workstation." "Any DHCP server on the network that receives the DHCPDISCOVER message from the workstation will respond with a DHCPOFFER message containing a proposed DHCP configuration."
"Your users are reporting that they cannot access any network resources on their Windows network. You can ping the IP address and connect to the network resource using the IP address. What is the cause of the problem?"
"The DNS server is not resolving correctly." "DNS servers make use of pointer records as well as A records. DNS permits hosts to resolve host names for an Internet Protocol address. The system operates similar to a telephone directory. DNS servers are used to resolve computer named to IP addresses."
"A DHCP enabled computer on the network is changing IP addresses and you want to have the same IP address assigned for that computer all the time. How will you accomplish that?"
"You need to add the computer to the reservation list."
"Multiple server's IP addresses fall within the DHCP scope that you have already assigned. What should you implement next to ensure these static IP addresses are not assigned to workstations?"
"You should create exclusions for the servers IP addresses." "Creating one or more exclusion ranges prevents the DHCP server from assigning a client lease with any address in the exclusion range, thereby protecting it for use as a static IP address and preventing address conflicts between statically configured devices and dynamically configured devices."
"You are using your web browser to access the http://www.mywebsite.com URL. Because your workstation has never accessed this URL before, it sends a request to resolve www.mywebsite.com to your organization's DNS server (ns.yourcorpwebsite.com). What happens next?"
"Your name server forwards the request to a root-level DNS server." "Because your name server is not authoritative for the mywebsite.com zone, it doesn't have a record for www.mywebsite.com. It also doesn't know which DNS server is aurhoritative for this zone, so it forwards the request to a root-level name server on the Internet."
"DNS services are in a failed state on a network. Some users require FQDN to access specific services. A temporary solution would be to ___"
"create a local host file on the PC." "You should consider making use of the local hosts file as these are an IP address for the computer, a common subnet mask for the LAN, a default gateway IP address for the local router interface, and the address of a DNS server."
"Which of the following commands would allow you to identify the currently assigned DNS server?"
"nslookup" "Your best option would be to make use of the nslookup command. nslookup displays information about a particular domain name, the name servers that serve it, and how they are configured. "
"Which of the following commands will allow you to see the DNS servers that a computer is configured to use?"
"nslookup" "nslookup displays information about a particular domain name, the name servers that serve it, and how they are configured."
"A user in your company is unable to send an email to another user at a different company. You believe that the issue is DNS related. After typing nslookup, which of the following commands would help determine the IP address of companies mail server?"
"set type=mx" "The nslookup command displays information about a particular domain name, the name servers that serve it, and how they are configured. The type=mx command sets the future query type to email servers for that particular domain."