A designated router (DR) is a router elected by a set of routers in a network to manage a specific set of links within the network. The DR is responsible for relaying packets received on its links to other routers in the network and packets received from other routers on its links to the appropriate links in the network.
A backup designated router (BDR) is a router elected by a set of routers in a network to manage a specific set of links within the network in the event that the DR fails. The BDR is responsible for relaying packets received on its links to other routers in the network and packets received from other routers on its links to the appropriate links in the network.
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What is designated router and backup designated router?
What is designated router and backup designated router?
A designated router (DR) is a router in a network that is responsible for electing a backup designated router (BDR). The BDR is responsible for maintaining the network if the DR fails.
Designated routers are used in networks that contain a single broadcast domain. In networks that contain multiple broadcast domains, a designated router is not necessary.
What is a designated router?
A designated router (DR) is a router that is elected to forward messages between two or more routers in a network. The DR is typically the router with the best path to the destination network.
The role of the DR is important in networks that use the Spanning Tree Protocol (STP), as it is responsible for creating and maintaining the Spanning Tree. The Spanning Tree is a diagram that shows the shortest path between any two nodes in a network. This is important for networks that use multiple paths to the same destination, as it prevents loops from forming in the network.
In a network that does not use the STP, there is no need for a designated router, as all routers can forward messages equally.
Which router should be designated router?
There are many factors to consider when designating a router. The most important factor is the network’s size.
If the network is small, a basic router with a limited number of features will suffice. If the network is large, a more powerful router with more features is required.
Other factors to consider include the number of users and devices on the network, the type of traffic the network will be carrying, and the level of security needed.
A router should also be designated based on its ability to handle certain tasks. For example, some routers are better at handling multiple connections, while others are better at handling encrypted traffic.
When choosing a router, it is important to consider the specific needs of the network. A router that is too powerful or too limited for the network’s needs will not be effective.
What is the difference between ABR and Asbr?
ABR (Adaptive Bit Rate) and Asbr (Adaptive Streaming Bit Rate) are both mechanisms used to deliver video content over the internet. They both aim to provide an optimal viewing experience by adapting the bit rate of the video stream to the available bandwidth and device capability.
ABR is a generic term for a family of algorithms that determine the bit rate for a video stream. There are a number of different ABR algorithms, each with its own strengths and weaknesses. The most common ABR algorithm is HLS (HTTP Live Streaming), which is used by YouTube, Netflix, and other streaming services.
Asbr is a specific type of ABR algorithm that is designed for streaming video over the internet. Asbr is based on the well-known MPEG-DASH (Dynamic Adaptive Streaming over HTTP) standard. MPEG-DASH is supported by most streaming services and devices.
The main difference between ABR and Asbr is that Asbr is specifically designed for streaming video over the internet, while ABR is a generic term that includes a number of different algorithms.
Asbr is faster and more efficient than ABR, and it can provide a better viewing experience on mobile devices. However, not all devices and streaming services support Asbr.
ABR is supported by most devices and streaming services, and it is more reliable than Asbr. However, ABR can be slower and less efficient than Asbr.
In conclusion, Asbr is a better choice than ABR for streaming video over the internet, but ABR is still a viable option in many cases.
How many DR and BDR are in an OSPF area?
In a standard OSPF network, there is one designated router (DR) and one backup designated router (BDR). These routers are elected by the other routers in the network based on a number of factors, including their priority value and their router ID.
The DR and BDR are responsible for maintaining the OSPF routing table and for propagating updates to the other routers in the network. They also act as a gateway to the rest of the network for devices that are not directly connected to the OSPF network.
If the DR or BDR fails, the other routers in the network will elect a new DR or BDR.
Which is elected first DR or BDR in OSPF?
When two or more routers are part of an OSPF network, one of them must be elected as the Designated Router (DR) and one must be elected as the Backup Designated Router (BDR). The DR is responsible for sending and receiving updates on behalf of the network, while the BDR simply backs up the DR in case of failure.
The election of a DR and BDR is a relatively simple process, and is based on the router’s priority value. The router with the highest priority value is elected as the DR, while the router with the next highest priority value is elected as the BDR. If there is a tie, the router with the highest router ID is elected as the DR, and the router with the next highest router ID is elected as the BDR.
It’s important to note that the DR and BDR are not elected based on which router is the most powerful or has the most bandwidth. The DR and BDR are simply elected based on their priority value.
So, which router is elected first DR or BDR in OSPF?
The router with the highest priority value is elected as the DR, while the router with the next highest priority value is elected as the BDR.
How many DRS are there in OSPF?
There are three types of DRS in OSPF, called designated router (DR), backup designated router (BDR), and assistant designated router (ADR).
