Which two key components are related to one firewall per ISP design option for e- commerce? (Choose two.)
A.
It is a common approach to single-homing
B.
This approach is commonly used in large sites
C.
Any failure on an edge router results in a loss of session
D.
It has one NAT to two ISP-assigned blocks
E.
It is difficult to set up and administer
Explanation:
E-Commerce Design Topologies for Connecting to Multiple ISPs– ISP connectivity is a key component.
– In dual-homing topologies one common approach is One Firewall per ISP
– A critical factor is whether there are prefixes for each service provider connection or a single common external prefix for both ISP connections
The figure shows a common approach to dual-homing or connecting a site to two ISPs.
This approach is common among small sites since it is relatively easy to set up and administer.
The basic approach is to use a router and/or firewall to connect to each ISP.
