In any network, various VLANs cater to different departments within an organization. For instance, one VLAN might serve the network engineering team, while another VLAN could be dedicated to security engineering Team. These VLANs are important in segmenting the network. It ensures that access to resources is restricted within each VLAN. Even though VLANs do
VLAN Hopping Attacks Mitigation Read More »
For a host to obtain an IP address from a DHCP server, it sends a DHCP request to the DHCP server on the network, and the server will reply by leasing out an IP address from the pool of available addresses to the host. DHCP clients connected to a switch are expected to transmit only
How to Configure DHCP Snooping In Cisco Packet Tracer Read More »
To make forwarding decisions, switches store the MAC address associated with any interface it used to receive frames in the MAC Address table. Next time, when a frame destined to that MAC address comes in on the switch, the switch looks up the MAC address table and uses the interface associated with that MAC address
Configuring Port Security to Prevent MAC Address Table Attack Read More »
In any network setup, ensuring secure access to devices like routers and switches is paramount to prevent potential security vulnerabilities. Failure to secure access could leave networks vulnerable to unauthorized access and malicious attacks. There are two primary methods to secure access to network devices. First, we can utilize the device’s local database to store
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Securing access to network devices in real-world scenarios is of utmost importance to protect against vulnerabilities. This entails allowing only authenticated users to connect and configure these devices, either through Telnet or SSH or locally through console connections. One method to enable access security on network devices like routers or Switch is by configuring security
How to Configure TACACS+ Server in Cisco Packet Tracer Read More »
In a real-world network, securing access to network devices is of paramount importance. This measure helps safeguard the devices from vulnerabilities by permitting only authenticated users to connect and configure network devices, whether through remote connections like Telnet or SSH, or through on-site connections like console connections. One approach to enhancing access security is by
How to Configure Radius Server in Cisco Packet Tracer Read More »
For a high-availability network, enterprise companies typically maintain connections with multiple internet service providers (ISPs) to ensure redundant internet connectivity. Among these ISPs, one is usually preferred over the others, often due to higher bandwidth or other factors. This preferred ISP serves as the primary link, while the connection from the second ISP acts as
How to Configure ISP Failover With Default Routes Using IP SLA Tracking Read More »
A floating static route is a backup route configured with a higher administrative distance than the primary route. It serves as a failover mechanism in case the primary route becomes unavailable. A floating static route is mainly used when there are two connections from a router to a subnetwork. The first connection may be using
How to Configure Floating Static Route Read More »
In any network, a default route serves as a fallback option for routers to forward traffic if there is no specific path to the destination of the traffic in the routing table. When a router receives a packet, it searches its routing table for a route to the destination. If a route exists, the router
How to Configure OSPF Default Route on a Cisco Router Read More »
Unlike point-to-point OSPF network, where OSPF routers exchange hello messages using the OSPF hello protocol to establish and maintain neighbor relationships, a multi-access network with three or more OSPF routers needs to elect an OSPF-designated router (DR) and a backup-designated router (BDR) in order to establish and maintain neighbor relationships. The DR and BDR are
How to Configure OSPF DR and BDR (Manipulating OSPF DR & BDR Election) Read More »
