RELIANCE 0-57C401-2模块卡件
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RELIANCE 0-57C401-2交换机是数据链路层设备，可以识别数据包中的MAC地址，并建立MAC地址和端口号之间的对应关系，即MAC地址表。交换机根据MAC地址将数据包转发到相应的端口，将冲突限制在端口上。所有与交换机相连的设备属于一个广播域。
RELIANCE 0-57C401-2管理型交换机相比非管理型交换机增加了很多功能，如VLAN、QoS、IGMP Snooping、端口镜像、ACL、DHCP服务器和广播多播带宽限制等功能。不同的管理型交换机的功能有所不同，通过使用相应功能可更好地管理网络。
RELIANCE 0-57C401-2三层交换机在交换机的基础上增加了路由功能，可以实现不同VLAN之间的通信，同时也可以实现不同网络之间的通信。
RELIANCE 0-57C401-2路由器是网络层设备，可以实现不同网络之间的通信，将数据包从一个网络传输到另一个网络。
网关是在不同协议之间进行数据转换的设备，例如将局域网与互联网连接起来时需要使用网关。
RELIANCE 0-57C401-2 switches are data link layer devices that can identify MAC addresses in data packets and establish a correspondence between MAC addresses and port numbers, known as MAC address tables. The switch forwards data packets to the corresponding port based on the MAC address, limiting conflicts to the port. All devices connected to the switch belong to a broadcast domain.
RELIANCE 0-57C401-2 managed switches add many functions compared to non managed switches, such as VLAN, QoS, IGMP Snooping, port mirroring, ACL, DHCP server, and broadcast multicast bandwidth limitations. The functions of different managed switches vary, and using the corresponding functions can better manage the network.
RELIANCE 0-57C401-2 three-layer switch adds routing function on the basis of the switch, which can achieve communication between different VLANs and also achieve communication between different networks.
RELIANCE 0-57C401-2 routers are network layer devices that enable communication between different networks, transferring data packets from one network to another.
A gateway is a device that converts data between different protocols, such as when connecting a local area network to the Internet.
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