Which three options are fields in CoA RequestResponse code packet? (Choose Three.)
A. state
B. acct-session-ID
C. length
D. authenticator
E. calling-station-ID
F. identifier
Which three options are fields in CoA RequestResponse code packet? (Choose Three.)
A. state
B. acct-session-ID
C. length
D. authenticator
E. calling-station-ID
F. identifier
CDF are corrected per previous comments
CDF
section 2.3 of RFC 5176: A summary of the data format is shown below. The fields are transmitted from left to right.
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Code | Identifier | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
| Authenticator |
| |
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attributes …
+-+-+-+-+-+-+-+-+-+-+-+-+-
I believe to be right the answer.
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_usr_aaa/configuration/15-sy/sec-usr-aaa-15-sy-book/sec-rad-coa.html#GUID-D59DD994-7519-44F0-84A6-A3880C09A86C
CoA Requests
CoA requests, as described in RFC 5176, are used in a pushed model to allow for session identification, host reauthentication, and session termination. The model comprises one request (CoA-Request) and two possible response codes:
– CoA acknowledgment (ACK) [CoA-ACK]
– CoA non-acknowledgment (NAK) [CoA-NAK]
The request is initiated from a CoA client (typically a RADIUS or policy server) and directed to the device that acts as a listener.
– RFC 5176 Compliance
RFC 5176 Compliance
The Disconnect Request message, which is also referred to as Packet of Disconnect (POD), is supported by the device for a session termination.
The following table shows the IETF attributes that are supported for the RADIUS Change of Authorization (CoA) feature.
Table 1 Supported IETF Attributes
Attribute Number Attribute Name
24 State
31 Calling-Station-ID
44 Acct-Session-ID
80 Message-Authenticator
101 Error-Cause
In my understanding, the correct answers are “C”, “D” and “F”. The question is about the “fields” in the COA Packet.
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_usr_aaa/configuration/15-sy/sec-usr-aaa-15-sy-book/sec-rad-coa.html#GUID-9213431A-2EF0-4750-888F-88116227182D
CoA Request Response Code
The CoA Request Response code can be used to issue a command to the device. The supported commands are listed in the “CoA Request Commands” section.
The packet format for a CoA Request Response code as defined in RFC 5176 consists of the following fields: Code, Identifier, Length, Authenticator, and Attributes in the Type:Length:Value (TLV) format.