This question
is targeted for Network Administrators or Engineers who
have managed switches/routers for 1-2 years. This is a theory
question which most should know with or without experience.
To answer this question correctly, the candidate will need
to understand the differences in routing protocols.
Scenario
Your
current network is comprised of two T1 lines of Internet
backbone connectivity. Each one is to a different provider
to prevent any potential down time. Your internal clients
plan to use VPN tunneling through the Internet. In order
to maximize the proper usage of both connections, and to
properly monitor and ensure the QoS (quality of service)
for each packet, it is best to implement a router/switch
that has which feature?
A) BGP (Boarder Gateway Protocol)
B) L2TP (Layer 2 Tunneling Protocol)
C) RO (Route Optimization) with Multihoming
D) NAT (Network Address Translation)
Answer
The correct answer
is C). Route Optimization with multihoming allows for efficient
management, load-balancing, and packet distribution for
QoS (i.e. latency, packet loss, etc.). This method will
allow for the best use of both T1 backbones.
Incorrect Answer Reasons
A) BGP - does
not assure QoS, thus not a good use for IP VPN's, VOIP,
e-commerce apps, etc.
B) L2TP
- this protocol is a transport layer for PPP connections
to a access server
D) NAT - used for the connectivity of remote clients through
a single point of access The correct solution is A, due
to the inherited permissions set on directory X:\PUBLIC
of READ, WRITE, and EXECUTE attributes.
About the author
Alexis Chen has gained a broad range of expertise over the
past seven years as a network consultant. He is responsible
for designing, implementing and supporting a variety of
networks for small to medium sized businesses. He has owned
and operated two network consulting firms and an Internet
provider and was successful in building these businesses
from the ground up. Alexis has a B.S. degree in Computer
Science from The University of Western Ontario
www.uwo.ca
