O texto a seguir será utilizado para responder à questão.

TCP/IP (Transmission Control Protocol/Internet Protocol) is the basic communication language or protocol of the Internet. It can also be used as a communications protocol in a private network (either an intranet or an extranet). When you are set up with direct access to the Internet, your computer is provided with a copy of the TCP/IP program just as every other computer that you may send messages to or get information from also has a copy of TCP/IP.

TCP/IP is a two-layer program. The higher layer, Transmission Control Protocol, manages the assembling of a message or file into smaller packets that are transmitted over the Internet and received by a TCP layer that reassembles the packets into the original message. The lower layer, Internet Protocol, handles the address part of each packet so that it gets to the right destination. Each gateway computer on the network checks this address to see where to forward the message. Even though some packets from the same message are routed differently than others, they’ll be reassembled at the destination.

TCP/IP uses the client/server model of communication in which a computer user (a client) requests and is provided a service (such as sending a Web page) by another computer (a server) in the network. TCP/IP communication is primarily point-to-point, meaning each communication is from one point (or host computer) in the network to another point or host computer. TCP/IP and the higher-level applications that use it are collectively said to be “stateless” because each client request is considered a new request unrelated to any previous one (unlike ordinary phone conversations that require a dedicated connection for the call duration). Being stateless frees network paths so that everyone can use them continuously. (Note that the TCP layer itself is not stateless as far as any one message is concerned. Its connection remains in place until all packets in a message have been received.)

[Extraído de: SearchNetworking - “TCP/IP (Transmission Control Protocol/Internet Protocol)”. http://searchnetworking.techtarget.com/ definition/TCP-IP]

Nas aplicações de nível superior que usam TCP/IP, cada solicitação do cliente é considerada um novo pedido. No texto, o(s) termo(s) que expressa(m) essa ideia é(são)

O texto a seguir será utilizado para responder à questão.

TCP/IP (Transmission Control Protocol/Internet Protocol) is the basic communication language or protocol of the Internet. It can also be used as a communications protocol in a private network (either an intranet or an extranet). When you are set up with direct access to the Internet, your computer is provided with a copy of the TCP/IP program just as every other computer that you may send messages to or get information from also has a copy of TCP/IP.

TCP/IP is a two-layer program. The higher layer, Transmission Control Protocol, manages the assembling of a message or file into smaller packets that are transmitted over the Internet and received by a TCP layer that reassembles the packets into the original message. The lower layer, Internet Protocol, handles the address part of each packet so that it gets to the right destination. Each gateway computer on the network checks this address to see where to forward the message. Even though some packets from the same message are routed differently than others, they’ll be reassembled at the destination.

TCP/IP uses the client/server model of communication in which a computer user (a client) requests and is provided a service (such as sending a Web page) by another computer (a server) in the network. TCP/IP communication is primarily point-to-point, meaning each communication is from one point (or host computer) in the network to another point or host computer. TCP/IP and the higher-level applications that use it are collectively said to be “stateless” because each client request is considered a new request unrelated to any previous one (unlike ordinary phone conversations that require a dedicated connection for the call duration). Being stateless frees network paths so that everyone can use them continuously. (Note that the TCP layer itself is not stateless as far as any one message is concerned. Its connection remains in place until all packets in a message have been received.)

[Extraído de: SearchNetworking - “TCP/IP (Transmission Control Protocol/Internet Protocol)”. http://searchnetworking.techtarget.com/ definition/TCP-IP]

De acordo com o texto, em uma rede TCP/IP, a verificação do endereço para o encaminhamento de uma mensagem é efetuada

O texto a seguir será utilizado para responder à questão.

A firewall is a software program or piece of hardware that helps screen out hackers, viruses, and worms that try to reach your computer over the Internet. If you can’t start Windows Firewall or you are getting an error, use our free tool to diagnose and fix problems.

• If you use a computer at home, the most effective and important first step you can take to help protect your computer is to turn on a firewall.

• Windows 8, Windows 7, Windows Vista, and Windows XP SP2 or higher have a firewall built-in and turned on by default. (Note: Support for Windows XP ends in April 2014.)

• If you have more than one computer connected in the home, or if you have a small-office network, it is important to protect every computer. You should have a hardware firewall (such as a router) to protect your network, but you should also use a software firewall on each computer
to help prevent the spread of a virus in your network if one of the computers becomes infected.

• If your computer is part of a business, school, or other organizational network, you should follow the policy established by the network administrator.

[Extraído de: Microsoft – Safety & Security Center - What is a firewall? http://www.microsoft.com/security/pc-security/firewalls-whatis.aspx]

O texto a seguir será utilizado para responder à questão.

A firewall is a software program or piece of hardware that helps screen out hackers, viruses, and worms that try to reach your computer over the Internet. If you can’t start Windows Firewall or you are getting an error, use our free tool to diagnose and fix problems.

• If you use a computer at home, the most effective and important first step you can take to help protect your computer is to turn on a firewall.

• Windows 8, Windows 7, Windows Vista, and Windows XP SP2 or higher have a firewall built-in and turned on by default. (Note: Support for Windows XP ends in April 2014.)

• If you have more than one computer connected in the home, or if you have a small-office network, it is important to protect every computer. You should have a hardware firewall (such as a router) to protect your network, but you should also use a software firewall on each computer
to help prevent the spread of a virus in your network if one of the computers becomes infected.

• If your computer is part of a business, school, or other organizational network, you should follow the policy established by the network administrator.

[Extraído de: Microsoft – Safety & Security Center - What is a firewall? http://www.microsoft.com/security/pc-security/firewalls-whatis.aspx]

Interpretando-se o texto, é correto afirmar que o firewall

Em ambientes de virtualização, é possível que haja comunicação TCP/IP entre a máquina hospedeira (host) e a máquina virtual (guest) mesmo que a máquina hospedeira não possua uma interface de rede física. Para tanto, é necessário que seja utilizada uma

Na gerência de memória de um computador, a alocação estática de memória é uma decisão tomada quando um dado programa for

No servidor central de uma rede corporativa existe uma aplicação em execução na porta TCP 8090 que é acessada por todas as filiais. No entanto, um tráfego desconhecido foi detectado na porta TCP 1569 entre o servidor e uma das filiais. O procedimento para impedir o tráfego desconhecido, e evitar a existência de novas ocorrências sem afetar a disponibilidade da aplicação, é

A partir do Windows Server 2008, o Active Directory (AD) fornece suas funcionalidades por meio de papéis diferentes que podem ser adicionados separadamente no servidor. Estes papéis são:

No Windows 2008 Server, é possível que existam duas interfaces de redes físicas diferentes ativas no mesmo computador ligadas na mesma rede. No entanto, para seu correto funcionamento, é necessário que

Por padrão, os números das portas TCP utilizadas pelos protocolos SMTP, POP (v.3) e IMAP (v.2) são, respectivamente: