A wildcard mask is a mask of bits that indicates which parts of an IP address are available for examination. In the Cisco IOS, [1] they are used in several places, for example: To indicate the size of a network or subnet for some routing protocols, such as OSPF.

A subnet mask is used in IP networks to divide the network into subnetworks.

2021年2月12日 · With a subnet mask, devices can look at an IP address, and figure out which parts are the network bits and which are the host bits. Then using those things, it can figure out the best way for those devices to communicate.

This IP subnet calculator covers both IPv4 and IPv6 protocols, providing information such as IP address, network address, subnet mask, IP range, and more.

2025年1月13日 · 原文： Subnet Cheat Sheet – 24 Subnet Mask, 30, 26, 27, 29, and other IP Address CIDR Network References. 作为开发人员或网络工程师，你可能需要时不时查阅子网掩码值并弄清其含义。 为了让你的生活更轻松，freeCodeCamp 社区制作了这个简单的备忘单。

Network # IP Range Broadcast.0.1-.2.3.4.5-.6.7.8.9-.10.11.12.13-.14.15.16.17-.18.19.20.21-.22.23.24.25-.26.27.28.29-.30.31.32.33-.34.35.36.37-.38

2018年10月28日 · 子网掩码是一个长32位的值，让IP分组的接收方能够将IP地址的网络ID部分和主机ID部分区分开来。 并非所有网络都需要子网，这意味着网络可使用默认子网掩码。 默认的子网掩码不能修改！ CIDR （Classless Inter-Domain Routing，无类域间路由选择），它是 ISP （Internet Service Provider，因特网服务提供商）用来将大量地址分配给客户的一种方法。 ISP以特定大小的块提供地址。 从ISP那里获得的地址块类似于192.168.10.32/28，这指出了子网掩 …

2024年1月1日 · /26 Subnet Meaning. A /26 subnet mask represents a network prefix length with 26 network bits and 6 host bits in binary notation. When applied, a /26 subnet mask divides a network into 64 IP ranges. The first IP address within this range serves as the network address, while the last IP is designated as the broadcast IP.

2024年7月15日 · /26 subnet mask creates 4 subnets if we have a default subnet mask of /24. In case of network administrator wants more networks however host requirement is less per network then using /26 as a subnet mask will provide 4 networks with each subnet having 64 …

2005年7月17日 · It looks like an IP address, and it uses a "1" bit to select, or "mask" the network part. In this case, the netmask of 255.255.255.248 represents 29 bits of network and 3 bits of host (totalling 32 bits, of course), and this give 8 possible IP addresses in this range.