Referring to the exhibit. Which WAN function is shown in the exhibit?

Question

Exhibit

Options

• AWAN aggregation
• BData Center Interconnect
• CInternet edge
• Dprivate WAN

• A
  14% (6)
• B
  2% (1)
• C
  74% (32)
• D
  9% (4)

Explanation

Internet edge is correct because the exhibit depicts the boundary where an organization's internal network connects to a public ISP, which is the defining characteristic of an Internet edge function - it serves as the ingress/egress point for internet-bound traffic, typically featuring a perimeter firewall or border router facing an ISP cloud.

Why the distractors are wrong:

• A (WAN aggregation): This would show multiple branch/spoke sites funneling their WAN connections into a central hub - a hub-and-spoke or aggregation topology, not a single outbound connection to the internet.
• B (Data Center Interconnect): DCI involves high-speed, dedicated links between two or more data centers for replication or failover - no ISP/public cloud would be shown.
• D (Private WAN): A private WAN uses dedicated infrastructure (MPLS, leased lines) entirely within or contracted to one organization, never touching the public internet.

Memory tip: Think of "Internet edge" as the front door of your network - it's the handoff point between your private space and the public internet. If the exhibit shows a firewall or router facing an ISP or "cloud" symbol representing the internet, you're looking at the Internet edge. Private WAN stays inside the fence; Internet edge is at the fence.

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