Each broadcast and Non-Broadcast Multi-Access (NBMA) network has a designated router. This router is the central point for collecting and distributing LSAs, so it must have enough CPU and memory capability to handle the workload. Configurations can be used to control the DR/BDR election process. The designated router decreases routing protocol traffic by enabling a… Read more
In the previous lesson, we discussed the challenges of the OSPF Multi-access network. The two challenges are unwanted adjacencies and the flooding of LSAs. The solution is the Designated Router (DR). DRs are designated to coordinate topology updates. On multiaccess networks, at initialization, a Designated Router (DR) and a backup designated router (BDR) are elected.
OSPF defines five types of network. The types are point-to-point, Broadcast Multi-access, Non-broadcast Multi-access (NBMA), point-to-multi-point and virtual networks. The Multiaccess networks can create two challenges for OSPF regarding the flooding of LSAs: Multiple adjacencies– Open shortest path first (OSPF) try to find the best path between the source and the destination router. There are multiple
What are Challenges in Multiaccess OSPF Networks Read More »
We have already discussed the frame control field format in the previous lesson that the Frame Control field contains multiple subfields. The figure below illustrates the subfields of the frame control field. Protocol Version – It is a 2-bit field that indicates the current version of the protocol. The receiving devices use this value to
Frame Control Field Format – Exclusive Explanation Read More »
All Layer 2 frames contain a header, payload, and FCS section. The 802.11 frame format is similar to the Ethernet frame format, with the exception that it contains more fields. The figure below illustrates the wireless 802.11 frame formats and fields. Frame Control – It is 2 bytes long field which determines the type of wireless
OSPF is a dynamic link-state routing protocol replacing the distance vector routing protocol, RIP. However, OSPF has important advantages over RIP. OSPF offers faster convergence and scales to much larger network implementations. The OSPF defines five types of OSPF networks: Point-to-point—A point–to–point network is when two routers are interconnected over a common link without any
Wireless antennas are elements of a radio communications system that radiate and/or collect radiofrequency energy. They are usually connected using a low-loss coaxial cable to a power amplifier, splitter, and filter or directly to wireless devices. For outdoor usage, wireless antennas are often attached via mounting clamps to a mast or the side of a
Wireless Deployment is depending on the requirement of an organization. Some organizations want coverage for small are while other needed coverage for a large area. Cisco offers deployment both for small and large organizations. Small Wireless Deployment For small wireless deployment requirements, Cisco offers autonomous AP solutions. The different types of autonomous APs are the
Wireless Deployment Solutions – Exclusive Explanation Read More »
In the LAN (Wired Network) each client connects to a switch. The switch is the center point for each client to gain access to the network. The wireless Access Points also connects to the switch. Wireless clients discover nearby APs using their wireless NIC. The wireless Access Points are advertising their SSID for the client.
A Wireless home router is a device that communicates between the internet and the devices in your home that connect to the internet. It routes traffic between the devices and the internet. Selecting the right kind of router for your home is very important. A wireless home router usually serves as: A wireless router server