300-720 · Question #133
An engineer is reviewing the SMTP routing table on a Cisco ESA using the smtproutes CLI command and discovers an IPv6 route for 2620:104:4360:9232::23. What type of IPv6 route does this represent?
The correct answer is C. Device route. An IPv6 route specifying a full 128-bit address like 2620:104:4360:9232::23 represents a device route, which directs traffic to a singular host endpoint.
Question
An engineer is reviewing the SMTP routing table on a Cisco ESA using the smtproutes CLI command and discovers an IPv6 route for 2620:104:4360:9232::23. What type of IPv6 route does this represent?
Options
- ANetwork route
- BSubnet route
- CDevice route
- DPrefix route
How the community answered
(41 responses)- B2% (1)
- C95% (39)
- D2% (1)
Why each option
An IPv6 route specifying a full 128-bit address like 2620:104:4360:9232::23 represents a device route, which directs traffic to a singular host endpoint.
A network route typically refers to a broader range of IP addresses, often denoted with a CIDR prefix shorter than /128, representing a network segment.
On a Cisco ESA, an IPv6 route defined with a complete 128-bit address (even in a compressed format) specifies a single host or device. This type of entry in the SMTP routing table is specifically categorized as a 'device route' as it targets one particular network endpoint.
Concept tested: Cisco ESA SMTP IPv6 route types
Source: https://www.cisco.com/c/en/us/td/docs/security/esa/esa12-0/user_guide/b_ESA_Admin_Guide_12_0/b_ESA_Admin_Guide_12_0_chapter_01000.html#con_1143899
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