Which three options are fields in CoA RequestResponse code packet?

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

cisco-exams

4 thoughts on “Which three options are fields in CoA RequestResponse code packet?

  1. 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 …
    +-+-+-+-+-+-+-+-+-+-+-+-+-

  2. 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

  3. 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.

Leave a Reply

Your email address will not be published. Required fields are marked *


The reCAPTCHA verification period has expired. Please reload the page.