Discuss ISC2 SSCP Exam Topic 9 Question 31

Which of the following best defines source routing?

AThe packets hold the forwarding information so they don't need to let bridges and routers decide what is the best route or way to get to the destination.

BThe packets hold source information in a fashion that source address cannot be forged.

CThe packets are encapsulated to conceal source information.

DThe packets hold information about redundant paths in order to provide a higher reliability.

Suggested Answer: A

With source routing, the packets hold the forwarding information so that they can find their way to the destination themselves without bridges and routers dictating their paths.

In computer networking, source routing allows a sender of a packet to specify the route the packet takes through the network.

With source routing the entire path to the destination is known to the sender and is included when sending data. Source routing differs from most other routing in that the source makes most or all of the routing decisions for each router along the way.

Source:

WALLHOFF, John, CISSP Summary 2002, April 2002, CBK#2 Telecommunications and Network Security (page 5)

Wikipedia at http://en.wikipedia.org/wiki/Dynamic_Source_Routing

Get Premium SSCP Questions as Interactive Web-Based Practice Test or PDF Real Exam Format Detailed Explanations Instant Access Get Your Practice Test

11 comments · newest first

Lashon 11 months ago

B is misleading, source info can still be forged in some cases.

Carmela 12 months ago

Wait, can packets really hold all that info? Sounds too good to be true.

Linn 12 months ago

A is spot on, no doubt about it!

Angelyn 12 months ago

I thought it was more about reliability, so D makes sense too.

Frank 1 year ago

Definitely A, that's how source routing works!

Haley 1 year ago

I recall something about redundancy in routing, but I’m not convinced that’s the main point of source routing. Option D seems off to me.

Dion 1 year ago

I practiced a question about packet encapsulation, but I don’t think that’s what source routing is about. So, I’m leaning away from option C.

Socorro 1 year ago

I’m not entirely sure, but I remember something about source addresses being secure. Could that relate to option B?

Cathrine 1 year ago

I think source routing is when the packets carry their own routing info, so routers don’t have to figure it out. That sounds like option A, right?

Flo 1 year ago

I'm feeling pretty confident about this one. I think adding a territory relationship to the work order is the way to go. That way, the system can automatically pull in the right pricing based on the customer's location when generating the invoice.

Coletta 1 year ago

I don't know, I thought the public key thing was more about encrypting data rather than chaining blocks.

ISC2 SSCP Exam - Topic 9 Question 31 Discussion