What Is Extended ACLs? Extended Access Control Lists (ACLs) are an advanced feature used in network devices like Cisco routers and switches to provide a stricter level of control over network traffic than standard ACLs. While standard ACLs filter traffic based solely on the source IP address, extended ACLs can filter based on multiple criteria, including: Source and… Read More »
What is VLAN? A Virtual Local Area Network (VLAN) is a network technology used to divide a single physical network into multiple logical networks. This division is achieved at the data link layer (Layer 2) of the OSI model. VLANs are widely used in enterprise networks for their ability to improve network efficiency, security, and manageability. Key Concepts… Read More »
What Is Dynamic Host Configuration Protocol – DHCP? Dynamic Host Configuration Protocol works in a client/server mode. DHCP enables clients on an IP network to obtain or lease IP addresses or configurations from a DHCP server. This reduces workload when managing a large network. DHCP protocol is described in the RFC 2131. Most modern operating system includes DHCP in… Read More »
The DHCP server’s most fundamental task is Providing IP addresses to clients. DHCP uses three different address allocation mechanisms when assigning IP addresses: Manual Allocation: The administrator manually assigns a pre-allocated IP address to the client and DHCP only communicates the IP address to the device. Automatic Allocation: DHCP automatically assigns a static IP address permanently to a device, selecting it from… Read More »
Configuring DHCP Lease Periods on Cisco router. What Is DHCP Lease Period? The DHCP (Dynamic Host Configuration Protocol) lease period refers to the length of time that a network device (like a computer, smartphone, or any other connected device) is allowed to use an IP address that’s been assigned to it by a DHCP server. This concept is… Read More »
