GCIA · Question #28
By gaining full control of router, hackers often acquire full control of the network. Which of the following methods are commonly used to attack Routers? Each correct answer represents a complete solu
The correct answer is A. By launching Sequence++ attack B. Route table poisoning D. By launching Max Age attack. Routers are most commonly compromised through technical protocol-level attacks such as sequence number manipulation, route table poisoning, and timer-based STP attacks, not through human-targeted social engineering.
Question
By gaining full control of router, hackers often acquire full control of the network. Which of the following methods are commonly used to attack Routers? Each correct answer represents a complete solution. Choose all that apply.
Options
- ABy launching Sequence++ attack
- BRoute table poisoning
- CBy launching Social Engineering attack
- DBy launching Max Age attack
How the community answered
(23 responses)- A78% (18)
- C22% (5)
Why each option
Routers are most commonly compromised through technical protocol-level attacks such as sequence number manipulation, route table poisoning, and timer-based STP attacks, not through human-targeted social engineering.
A Sequence++ attack exploits predictable or incremented sequence numbers in routing protocols or TCP sessions to inject spoofed routing updates or hijack established sessions, allowing the attacker to manipulate traffic flow through the router.
Route table poisoning injects false or malicious entries directly into a router's routing table - often via unauthenticated routing protocol updates - redirecting network traffic through attacker-controlled paths for interception or disruption.
Social engineering manipulates human operators into revealing passwords or performing unsafe actions; it does not directly exploit any router protocol, firmware, or hardware, so it is not a method used to attack the router itself.
A Max Age attack targets Spanning Tree Protocol by sending crafted BPDUs with manipulated Max Age timer values, forcing switches and routers to believe topology information has expired and triggering continuous reconvergence that destabilizes the network.
Concept tested: Common technical methods used to attack routers
Source: https://www.cisco.com/c/en/us/support/docs/ip/access-lists/13608-21.html
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