Server+ Module 2.2

Which network service provides requests on behalf of clients in order to mask internal addresses?

Proxy. A proxy server provides web requests on behalf of clients. With a proxy server, a client's request is not sent directly to the remote host. Instead, the request goes to the proxy server, which then sends the request to the remote host on behalf of the client. Before sending the packet, the proxy server replaces the original sender's address and other identifying information with its own. When the response arrives, the proxy server looks up the original sending node's information, updates the incoming packet, and forwards it to the client. By these actions, a proxy server masks internal Internet Protocol (IP) addresses, like a Network Address Translation (NAT) device. It also blocks unwanted inbound traffic—there will be no corresponding outbound connection data in its tables, so the packets will be dropped. Many proxy servers also provide caching functions, which speed up web page access for internal users.

Which type of network services server provides network computers with Internet Protocol (IP) addresses, subnet masks, and default gateways?

A Dynamic Host Configuration Protocol (DHCP) server runs software that automatically assigns IP addresses to client stations logging on to a TCP/IP network. It eliminates the need to manually assign permanent IP addresses. DHCP software typically runs on servers and is also found in network devices such as firewalls, ISDN routers, and modem routers that allow multiple users access to the Internet. DHCP servers provide IP addressing information for network computers. This information includes IP addresses, subnet masks, default gateways, and DNS server addresses.

Which type of server provides time synchronization services?

A Network Time Protocol (NTP) server provides time synchronization services for computer clocks. This server provides the mechanisms to synchronize time and coordinate time distribution in a large network. Correct times are important for authentication services.

What is provided by a directory server?

A directory server provides authentication services across an organization, providing access via a single logon to servers and computers within the organization.

Which service provides access to a bank of modems?

A fax server provides a bank of fax modems, allowing users to fax out messages and remote users to fax in messages over the next available modem. It may be a dedicated machine or implemented on a file server that is providing other services.

Which type of server, in addition to its stated functional service, also often provides services such as document collaboration, chat, web access, and file storage?

A mail server, also called the message server, provides post office facilities by storing incoming mail or messages for distribution to users and forwarding outgoing mails or messages through appropriate channels. Many of today's mail servers also provide other services such as document collaboration, chat, web access, and file storage. The term may refer to just the software that performs this service while residing on a machine with other service functions. A web server provides access to personal, corporate, or education website content. This service is provided primarily to external users, such as customers or students, who access the web services from the Internet. Web servers typically provide web services to external users, although intranet servers can provide web services to internal users. A proxy server is a system that isolates internal clients from the servers by downloading and storing files on behalf of the clients. It intercepts requests for web-based or other resources that come from the clients, and, if it does not have the data in its cache, it can generate a completely new request packet using itself as the source, or simply relay the request. In addition to providing security, the data cache can also improve client response time and reduce network traffic by providing frequently used resources to clients from a local source. File servers are computers that store the programs and data files intended to be shared by multiple users. Many file servers use high-speed LAN or WAN links to keep data moving at optimal rates. Simply put, a file server acts like a remote disk drive. A file server might also be combined with a print server. In this case, it provides access to shared files, such as documents, pictures, spreadsheets, and graphics, as well as access to laser and inkjet printers.

What type of server is often combined with a file server?

A print server enables many network users to share the common printers. The printers might be directly attached to the network or attached to the server. A file server might be combined with a print server. In this case, the file server provides access to shared files, such as documents, pictures, spreadsheets, and graphics, as well as access to laser and inkjet printers.

Which service can block unwanted inbound traffic by not having corresponding outbound connection data in its tables?

A proxy server also blocks unwanted inbound traffic—there will be no corresponding outbound connection data in its tables, so the packets will be dropped.

Which network services server is capable of emulating multiple hosts simultaneously and allotting separate virtual sessions for each host?

A terminal server is designed to be capable of emulating multiple hosts at the same time and allotting separate virtual sessions for each host. It is widely used in centralized computing networks where multiple clients may need to access the server at the same time. If the demands of the client are low, then the companies can use terminal services as a way of extending the lives of their outdated computers. Because a terminal server can support hundreds of sessions, companies can spend money on upgrading the server and use older clients, thereby saving money.

Which statement is true regarding the web server, server role?

A web server provides access to personal, corporate, or education website content. This service is provided primarily to external users, such as customers or students, who access the web services from the Internet. Web servers typically provide web services to external users, although intranet servers can provide web services to internal users.

Which statement correctly describes an application server?

An application server provides access to shared applications, including data warehousing, data processing, and other applications shared among multiple users.

What is housed on a database server?

Database management system and databases. A database server holds the database management system (DBMS) and databases. It is dedicated to database storage, updating, and retrieval, and is a key component in a client/server environment.

Which service provides authentication services for single logon?

Directory services servers provide authentication services across an organization, providing access via a single logon to servers and computers within the organization. Directory services servers also authenticate incoming connections, providing remote access to users outside the network. These include users who are traveling or who work remotely from home or other organizational sites.

Which type of network services server provides name resolution services for users accessing Internet resources?

Domain Name System (DNS). DNS servers provide name resolution services for users accessing Internet resources. Name resolution allows users to use familiar web names, such as www.microsoft.com, instead of using Internet Protocol (IP) addresses, to access websites. DNS servers also point users to internal resources, such as directory services, file and print servers, and database servers.

What type of server stores programs and data files that are shared by multiple users?

File servers are computers that store the programs and data files intended to be shared by multiple users.

On a Windows Server 2012 R2 server, in Server Manager, which option do you need to select to install a server role?

In Server Manager, from the Dashboard page, select Add roles and features

What is the term for a web server that provides web services to internal users only?

Intranet server. Web servers typically provide web services to external users, although intranet servers can provide web services to internal users.

What is an example of a mail server you might encounter?

Microsoft Exchange Server

Which server role is designed to provide access to internal network services and computers for those working outside the network?

Routing and remote access server. A routing and remote access server provides access to internal network services and computers for employees working outside the network. This is a useful feature for employees who are traveling or working from home. These are referred to as remote services.

Why do organizations create messaging servers?

To give users a secure way to send and receive messages without using less-secure Internet instant messaging services. A messaging server provides instant messaging, primarily for internal users. Some organizations have dedicated messaging servers, giving users a secure way to send and receive messages without using less-secure Internet instant messaging services.