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Subsea Cables Carry 99% Internet Traffic: Vulnerabilities, Ownership Concentration & India's Resilience Plan

Target:UPSC GS-IIIMPSCTeachingSSC GAPrelims HighMains HighStatic GK Link
24 Sept 2026
~2 min
Source: Indian Express
Key Data:Over 99% internet traffic18 subsea cables in India5 landing sites~90% cable length by 3 manufacturers2025 Estonia-Finland cable damage
Bodies:NATODepartment of Telecom (DoT)Alcatel Submarine NetworksSubComNEC
Practice MCQs from today's news ▸
What This Article Covers

1.Subsea cables carry over 99% of global internet traffic, making them strategic assets comparable to national energy grids.

2.Three manufacturers — Alcatel Submarine Networks (France), SubCom (US), NEC (Japan) — have built ~90% of current cable length.

3.India hosts 18 subsea cables at 5 landing sites; DoT plans a single-window clearance to boost domestic repair capacity.

The Big Picture
Prelims · HighMains · High

Subsea cables carry over 99% of global internet traffic, yet their supply chain is concentrated among a few private players and hyperscalers, making them vulnerable to sabotage, cyberattacks, and economic disruption. Recent NATO, Finland, and China incidents highlight intensifying threats, while India is building repair capacity via a DoT single-window clearance portal. This is a high-yield topic for GS3 infrastructure, science-tech, and security questions.

Exam Lens

Quick Exam Facts From News

Internet traffic share>99%
India's subsea cables18 cables, 5 landing sites
Top 3 cable manufacturersAlcatel Submarine Networks (France), SubCom (US), NEC (Japan)
Cable length built by top 3~90%
Example incident2025 damage to Estonia-Finland cable by vessel sailing from Russia
DoT initiativeSingle-window clearance portal for cable repair investment

1-Minute Revision

  • ›Internet traffic share: >99%
  • ›India's subsea cables: 18 cables, 5 landing sites
  • ›Target this Data: Over 99% of internet traffic travels via subsea cables; India has 18 subsea cables at 5 landing sites.
  • ›Target this Nodal Body: Department of Telecom (DoT) — building a single-window clearance portal for cable repair investment.
  • ›Target this Concentration: Alcatel Submarine Networks (France), SubCom (US), NEC (Japan) built ~90% of present cable length.

Mastered this topic? Test your knowledge with a full MCQ quiz.

Practice exam-style questions, track your score, and strengthen your recall.

Q1Static LinkageEasy

Which three companies, according to the article, dominate the global subsea cable manufacturing market?

Q2Statement-basedHard

Consider the following statements:

1. Subsea cables carry over 99% of the internet's traffic.

2. The global subsea cable network is entirely owned and managed by governments.

3. India hosts 18 subsea cables landing across five major sites.

Which of the statements given above is/are correct?

Q3Data-centricMedium

According to the article, what approximate percentage of total subsea cable length has been built by the three key manufacturers together?

Q4Application/ImpactMedium

Why do subsea cables increasingly become strategic targets, as explained in the article?

All 20 MCQs ▸
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