Archive for June, 2020

Remote-Access VPNs

Posted: 28th June 2020 by ccna7guru in ITN

In the previous topic you learned about the basics of a VPN. Here you will learn about the types of VPNs. VPNs have become the logical solution for remote-access connectivity for many reasons. As shown in the figure, remote-access VPNs let remote and mobile users securely connect to the enterprise by creating an encrypted tunnel. […]

Enterprise Networking, Security, and Automation (ENSA)

Posted: 28th June 2020 by ccna7guru in ENSA

These course materials will assist you in developing the skills necessary to do the following: Explain how single-area OSPF operates in both point-to-point and broadcast multiaccess networks. Verify single-area OSPFv2 in both point-to-point and broadcast multiaccess networks. Explain how vulnerabilities, threats, and exploits can be mitigated to enhance network security. Explain how ACLs are used […]


Posted: 21st June 2020 by ccna7guru in ENSA

OSPFv3 is the OSPFv2 equivalent for exchanging IPv6 prefixes. Recall that in IPv6, the network address is referred to as the prefix and the subnet mask is called the prefix-length. Similar to its IPv4 counterpart, OSPFv3 exchanges routing information to populate the IPv6 routing table with remote prefixes. Note: With the OSPFv3 Address Families feature, […]

Link-State Operation of OSPF

Posted: 21st June 2020 by ccna7guru in ENSA

To maintain routing information, OSPF routers complete a generic link-state routing process to reach a state of convergence. The figure shows a five router topology. Each link between routers is labeled with a cost value. In OSPF, cost is used to determine the best path to the destination. The following are the link-state routing steps […]

Basic Router Configuration Review

Posted: 21st June 2020 by ccna7guru in SRWE

Verification Commands Common verification commands include the following: •show ip interface brief •show running-config interfaceinterface-type number •show interfaces •show ip interface •show ip route •ping In each case, replace ip with ipv6 for the IPv6 version of the command.

Build the Routing Table

Posted: 21st June 2020 by ccna7guru in SRWE

Directly Connected Networks: Added to the routing table when a local interface is configured with an IP address and subnet mask (prefix length) and is active (up and up). Remote Networks: Networks that are not directly connected to the router. Routers learn about remote networks in two ways: •Static routes – Added to the routing table when […]

Passive and Active Discover Mode

Posted: 20th June 2020 by ccna7guru in SRWE

Control Plane and Data Plane

Posted: 14th June 2020 by ccna7guru in ENSA

The previous topic explained virtual network infrastructure. This topic will cover Software- Defined Networking (SDN). SDN was explained in the previous video. We will cover more details here. A network device contains the following planes: Control plane – This is typically regarded as the brains of a device. It is used to make forwarding decisions. The […]

Hello Packet in OSPFv2

Posted: 6th June 2020 by ccna7guru in ITN

The OSPF Type 1 packet is the Hello packet. Hello packets are used to do the following: Discover OSPF neighbors and establish neighbor adjacencies. Advertise parameters on which two routers must agree to become neighbors. Elect the Designated Router (DR) and Backup Designated Router (BDR) on multiaccess networks like Ethernet. Point-to-point links do not require […]

Types of OSPF Packets

Posted: 5th June 2020 by ccna7guru in SRWE

Link-state packets are the tools used by OSPF to help determine the fastest available route for a packet. OSPF uses the following link-state packets (LSPs) to establish and maintain neighbor adjacencies and exchange routing updates. Each packet serves a specific purpose in the OSPF routing process, as follows: Type 1: Hello packet – This is used […]