The administrator must configure Border Gateway Protocol (BGP) on the Tier-0 Gateway to establish neighbor relationships with upstream routers. Which two statements describe the Border Gateway…

Question

Options

• AEIGRP is configured by default.
• BCan be used as an Exterior Gateway Protocol.
• CThe network is divided into areas that are logical groups.
• DIt supports a 4-byte autonomous system number.

• A
  5% (1)
• B
  75% (15)
• C
  20% (4)

Explanation

In the architecture of VMware Cloud Foundation (VCF) and its networking component, NSX, the Tier- 0 Gateway serves as the critical demarcation point between the virtualized overlay network and the physical infrastructure. To facilitate this communication, BGP is the industry-standard protocol utilized. BGP is fundamentally designed as an Exterior Gateway Protocol (EGP). While it can be used internally (iBGP), its primary role in a VCF deployment is to exchange routing information between the SDDC and the physical Top-of-Rack (ToR) switches or core routers (eBGP). This allows the physical network to learn about the virtual subnets (overlay segments) and allows the virtual environment to receive a default route or specific external prefixes. This confirms that BGP is utilized as an EGP in these designs. Furthermore, as global IP networking has evolved, the traditional 2-byte Autonomous System (AS) numbers (ranging from 1 to 65,535) were found to be insufficient for the number of organizations requiring them. Modern NSX versions integrated into VCF 5.x and 9.0 fully support 4-byte Autonomous System numbers (ranging from 1 to 4,294,967,295). This support is essential for service providers and large enterprises that have been assigned 4-byte ASNs by regional internet registries.

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