上海京生电器有限公司

上海京生电器有限公司

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计算机英语在线翻译

  发布于 2019-10-19   阅读()  

  网关(Gateway)又称网间连接器、协议转换器。网关在传输层上以实现网络互连,是最复杂的网络互连设备,仅用于两个高层协议不同的网络互连。网关既可以用于广域网互连,也可以用于局域网...

  网关(Gateway)又称网间连接器、协议转换器。网关在传输层上以实现网络互连,是最复杂的网络互连设备,仅用于两个高层协议不同的网络互连。网关既可以用于广域网互连,也可以用于局域网互连。 网关是一种充当转换重任的计算机系统或设备。在使用不同的通信协议、数据格式或语言,甚至体系结构完全不同的两种系统之间,网关是一个翻译器。与网桥只是简单地传达信息不同,网关对收到的信息要重新打包,以适应目的系统的需求。白小姐中特信封工业和信息化部消费品工业司高延敏司长在会上指出,同时,网关也可以提供过滤和安全功能。大多数网关运行在OSI 7层协议的顶层--应用层。

  大家都知道,从一个房间走到另一个房间,必然要经过一扇门。同样,从一个网络向另一个网络发送信息,也必须经过一道“关口”,这道关口就是网关。顾名思义,网关(Gateway)就是一个网络连接到另一个网络的“关口”。 在OSI中,网关有两种:一种是面向连接的网关,一种是无连接的网关。当两个子网之间有一定距离时,往往将一个网关分成两半,中间用一条链路连接起来,我们称之为半网关。 按照不同的分类标准,网关也有很多种。TCP/IP协议里的网关是最常用的,在这里我们所讲的“网关”均指TCP/IP协议下的网关。 那么网关到底是什么呢?网关实质上是一个网络通向其他网络的IP地址。比如有网络A和网络B,网络A的IP地址范围为“192.168.1.1~192. 168.1.254”,子网掩码为255.255.255.0;网络B的IP地址范围为“192.168.2.1~192.168.2.254”,子网掩码为255.255.255.0。在没有路由器的情况下,两个网络之间是不能进行TCP/IP通信的,即使是两个网络连接在同一台交换机(或集线器)上,TCP/IP协议也会根据子网掩码(255.255.255.0)判定两个网络中的主机处在不同的网络里。而要实现这两个网络之间的通信,则必须通过网关。如果网络A中的主机发现数据包的目的主机不在本地网络中,就把数据包转发给它自己的网关,再由网关转发给网络B的网关,网络B的网关再转发给网络B的某个主机(如附图所示)。网络B向网络A转发数据包的过程。 所以说,只有设置好网关的IP地址,TCP/IP协议才能实现不同网络之间的相互通信。那么这个IP地址是哪台机器的IP地址呢?网关的IP地址是具有路由功能的设备的IP地址,具有路由功能的设备有路由器、启用了路由协议的服务器(实质上相当于一台路由器)、代理服务器(也相当于一台路由器)。 在和 Novell NetWare 网络交互操作的上下文中,网关在 Windows 网络中使用的服务器信息块 (SMB) 协议以及 NetWare 网络使用的 NetWare 核心协议 (NCP) 之间起着桥梁的作用。建行电子承兑接收步骤再也不用为签章犯。网关也被称为 IP 路由器。,怎么办?

  As we all know, from a room to another room, must pass a door. Also, from one to another, and send information network must pass a pass, this is the gateway to pass. Just as its name implies, Gateway (Gateway) is a network connection to another level of network . In the OSI, gateway has two kinds: one kind is connection-oriented gateway, a connectionless gateway. When a certain distance between two subnet, often be a gateway into two halves, with a link between connected, we call half gateway. According to different classification standard, also have very many. Gateways, The TCP/IP protocol gateways are the most commonly used in here, we speak of gateway are under the TCP/IP protocol gateways. So what exactly is gateway? In a gateway to the Internet and other network IP address. For example, there are network and network, the network of B IP address range for 192.168.1.1-192. 168.1.254, the subnet mask for 255.255.255.0, B IP address range network for 192.168.2.1 ~ 192.168.2.254 , the subnet mask for 255.255.255.0. In no circumstances, the router is not between two network for TCP/IP communications, even two network connection in the same switch (or hub), the TCP/IP protocol would also according to the subnet mask (255.255.255.0) in the two network judgement at different networks. And to achieve this network of communication between the two, then must through the gateway. If A packet network in the main purpose that is not local networks, put forward the packet to its own gateway, again by forwarding gateway to the network, network gateways B the gateway to transmit to B A host of network B (figure). A network to forward packets of network. Say so, only set good gateway IP address, the TCP/IP protocol to realize the interaction between the different network communication. So the IP address is the IP address of the machine? The IP address of the gateway is a routing functions of the IP address of the equipment, equipment for a router routing function, opening the routing protocol server (substantially equivalent to a router), proxy server (equivalent to a router). In the interactive network and Novell NetWare, in the context of the gateway to the server Windows used in network information block (SMB) agreement and the core network NetWare agreement (NCP) NetWare plays a role of bridge between. Gateway is also called the IP router.,你可以去试试

  As we all know, from a room to another room, must pass a door. Also, from one to another, and send information network must pass a pass, this is the gateway to pass. Just as its name implies, Gateway (Gateway) is a network connection to another level of network . In the OSI, gateway has two kinds: one kind is connection-oriented gateway, a connectionless gateway. When a certain distance between two subnet, often be a gateway into two halves, with a link between connected, we call half gateway. According to different classification standard, also have very many. Gateways, The TCP/IP protocol gateways are the most commonly used in here, we speak of gateway are under the TCP/IP protocol gateways. So what exactly is gateway? In a gateway to the Internet and other network IP address. For example, there are network and network, the network of B IP address range for 192.168.1.1-192. 168.1.254, the subnet mask for 255.255.255.0, B IP address range network for 192.168.2.1 ~ 192.168.2.254 , the subnet mask for 255.255.255.0. In no circumstances, the router is not between two network for TCP/IP communications, even two network connection in the same switch (or hub), the TCP/IP protocol would also according to the subnet mask (255.255.255.0) in the two network judgement at different networks. And to achieve this network of communication between the two, then must through the gateway. If A packet network in the main purpose that is not local networks, put forward the packet to its own gateway, again by forwarding gateway to the network, network gateways B the gateway to transmit to B A host of network B (figure). A network to forward packets of network. Say so, only set good gateway IP address, the TCP/IP protocol to realize the interaction between the different network communication. So the IP address is the IP address of the machine? The IP address of the gateway is a routing functions of the IP address of the equipment, equipment for a router routing function, opening the routing protocol server (substantially equivalent to a router), proxy server (equivalent to a router). In the interactive network and Novell NetWare, in the context of the gateway to the server Windows used in network information block (SMB) agreement and the core network NetWare agreement (NCP) NetWare plays a role of bridge between.