What Distinguishes Outside Gateway Protocols From Inner Gateway Protocols?

EGP (Exterior Gateway Protocol) and IGP (Interior Gateway Protocol) are two types of routing protocols used in computer networks. EGP is an older protocol primarily used for exchanging routing information between different autonomous systems, while IGPs handle routing within an autonomous system (one routing domain). Both protocols are designed for use in a single autonomous system.

There are two major types of IP routing protocols: Interior Gateway Protocol (IGP) and Exterior Gateway Protocol (EGP). IGPs determine routing between nodes, while exterior gateways belong to different autonomous systems and use the Exterior Gateway Protocol (EGP), the Border Gateway Protocol (BGP), or BGP4+.

Interior gateways are gateways that belong to the same autonomous system and communicate with each other using the Routing Information Protocol (RIP). They forward packets among different networks using the same autonomous system number. Exterior gateways handle routing outside an autonomous system and get users from their network through the Internet provider’s network.

In summary, both EGP and IGP are essential routing protocols used in computer networks, but they differ in their scope and purpose. EGP is used for exchanging routing information within a single autonomous system, while IGPs handle routing within individual networks of a single organization. Both protocols play a crucial role in ensuring efficient communication and coordination between different autonomous systems.

What is the difference between interior gateway protocol and exterior gateway protocols?

The Interior Gateway Protocol (IGP) is responsible for the forwarding of packets between networks that share the same autonomous system number. In contrast, the Exterior Gateway Protocol (EGP) is tasked with the forwarding of data packets to networks that possess different autonomous system numbers.

What is the difference between internal and external routing?

In the context of network routing, external routing refers to the exchange of routing information between autonomous systems. This is achieved through the use of External BGP (eBGP), which facilitates the transfer of routes between disparate systems, and Internal BGP (iBGP), which enables the communication of routes within a single system.

What is the interior gateway protocol?

An interior gateway protocol (IGP) is a type of routing protocol used to exchange routing table information between gateways within an autonomous system, such as corporate local area networks. This information can then be used to route network-layer protocols like IP. IGPs can be divided into distance-vector and link-state routing protocols, with examples including Open Shortest Path First (OSPF), Routing Information Protocol (RIP), Intermediate System to Intermediate System (IS-IS), and Enhanced Interior Gateway Routing Protocol (EIGRP). On the other hand, exterior gateway protocols exchange routing information between autonomous systems and rely on IGPs to resolve routes within an autonomous system.

What is the difference between IGP and IGRP?

IGRP is a proprietary distance vector interior gateway protocol (IGP) developed by Cisco, used by routers to exchange routing data within autonomous systems. It was created to overcome the limitations of RIP, which had a maximum hop count of 15 and a single routing metric. IGRP supports multiple metrics for each route, including bandwidth, delay, load, and reliability. These metrics are combined into a single metric using a formula that can be adjusted using pre-set constants.

The IGRP composite metric is a sum of segment delays and lowest segment bandwidth. The maximum configurable hop count of IGRP-routed packets is 255, and routing updates are broadcast every 90 seconds. IGRP uses protocol number 9 for communication. It is considered a classful routing protocol, as it assumes all subnetwork addresses within the same Class A, Class B, or Class C network have the same subnet mask as the subnet mask configured for the interfaces in question. Classless routing protocols can use variable length subnet masks, but they have become less popular due to their waste of IP address space.

What is an example of an exterior gateway protocol?

An exterior gateway protocol is an IP routing protocol used to exchange routing information between autonomous systems, crucial for Internet communications. Notable exterior gateway protocols include EGP (now obsolete) and BGP (Border Gateway Protocol). On the other hand, an interior gateway protocol is used for exchanging routing information between gateways within an autonomous system, such as corporate local area networks. This information can then be used to route network-level protocols like IP. Both types of protocols are essential for efficient communication across the Internet.

Is OSPF IGP or EGP?

In his text, “OCG ICND1 100-101,” Wendell Odom posits that the Open Shortest Path First (OSPF) protocol is an Interior Gateway Protocol (IGP), whereas only the Border Gateway Protocol (BGP) is an Exterior Gateway Protocol (EGP). This assertion is made on page 464 of the aforementioned text.

Why BGP is not used AS IGP?

BGP is not responsible for routing within an AS, but shares prefixes between iBGP routers to share them with other ASes. Routing within an AS must be achieved using IGP or static routing, allowing all iBGP routers to reach each other for full mesh iBGP peering. iBGP collects internal prefixes within the AS for sharing them via eBGP with other ASes. It is important to note that iBGP peers don’t have to be directly connected.

What is the difference between internal and external?

The term “internal” is used to describe that which exists or occurs within another entity, whereas “external” is used to describe that which exists or occurs outside of another entity. In many cases, the term “external” is used to describe something that exists or happens within or outside the human body.

What is the difference between internal and external gateway?

The external gateway is configured on the external IP address, whereas the internal gateway is configured on the internal IP address. It is imperative that the DNS records align with the configuration parameters specified within the portal. A campus networking infrastructure comprising a local area network (LAN) and a wireless local area network (WLAN) has been implemented for internal use. The infrastructure employs two distinct subnets and does not utilize tunnel mode for user identification, facilitating access to the Internet via a Palo Alto firewall.

What is the main difference between external and internal?

The term “internal” is used to describe that which exists or occurs within another entity, whereas “external” is used to describe that which exists or occurs outside of another entity. In many cases, the term “external” is used to describe something that exists or happens within or outside the human body.