Here is what I confirmed.

- List networks
   It returns 401 when giving a wrong token.

    $ curl -i -X GET -H "x-auth-token: dummy" http://192.168.122.111:9696/v2.0/networks
    HTTP/1.1 401 Unauthorized
    Content-Type: text/html; charset=UTF-8
    Content-Length: 23
    Www-Authenticate: Keystone uri='http://192.168.122.111:5000'
    X-Openstack-Request-Id: req-bd75e25a-b102-4ec2-a68e-7ea16feb05bf
    Date: Thu, 23 Jul 2015 11:55:32 GMT


- Create network
   It returns 400 when giving a bad request body.

    $ curl -i -X POST -H "x-auth-token: $TOKEN" -H "content-type:application/jason" -d '{"network":{"dummy":"dummy"}}'  http://192.168.122.111:9696/v2.0/networks
    HTTP/1.1 400 Bad Request
    Content-Length: 106
    Content-Type: application/json; charset=UTF-8
    X-Openstack-Request-Id: req-ba7ebf42-b1fb-48f8-bc34-62ac8408b9b1
    Date: Thu, 23 Jul 2015 11:58:56 GMT

  It returns 401 when giving a wrong token.

    $ curl -i -X POST -H "x-auth-token: dummy" -H "content-type:application/jason" -d '{"network":{}}' http://192.168.122.111:9696/v2.0/networks
    HTTP/1.1 401 Unauthorized
    Content-Type: text/html; charset=UTF-8
    Content-Length: 23
    Www-Authenticate: Keystone uri='http://192.168.122.111:5000'
    X-Openstack-Request-Id: req-c4382d22-5ff6-415b-b8a3-98abada420e6
    Date: Thu, 23 Jul 2015 12:00:00 GMT


- Show network details
  It returns 401 when giving a wrong token.

    $ neutron net-list
    +--------------------------------------+----------+----------------------------------------------------------+
    | id                                   | name     | subnets                                                  |
    +--------------------------------------+----------+----------------------------------------------------------+
    | 0d4af632-5e88-4d9a-a155-3f1a64a49986 | private4 | a0a928f1-e057-4ecd-99d6-659fe2c950c5 fdc6:3c3c:39a7::/64 |
    |                                      |          | a9d8ad08-71f9-4a7b-82f1-9005ff24e7c1 10.0.0.0/24         |
    | ae75fb2a-c44f-4e85-a1b5-c2b79bd79dab | public   | c2c2c941-c315-43b3-8318-73adff030aad 172.24.4.0/24       |
    |                                      |          | e8cb68cf-f0ad-4d7e-a0b3-2c56d35f01ce 2001:db8::/64       |
    +--------------------------------------+----------+----------------------------------------------------------+
    $ curl -i -X GET -H "x-auth-token: dummy" http://192.168.122.111:9696/v2.0/networks/0d4af632-5e88-4d9a-a155-3f1a64a49986
    HTTP/1.1 401 Unauthorized
    Content-Type: text/html; charset=UTF-8
    Content-Length: 23
    Www-Authenticate: Keystone uri='http://192.168.122.111:5000'
    X-Openstack-Request-Id: req-b6442ede-d972-45c4-82b6-fb0adff5108f
    Date: Thu, 23 Jul 2015 12:02:20 GMT

  It returns 404 when giving a wrong network-id.

    $ curl -i -X GET -H "x-auth-token: $TOKEN" http://192.168.122.111:9696/v2.0/networks/dummy
    HTTP/1.1 404 Not Found
    Content-Length: 154
    Content-Type: text/html; charset=UTF-8
    X-Openstack-Request-Id: req-1f28e824-6c6a-432d-bcf2-113b4071e03d
    Date: Thu, 23 Jul 2015 12:03:32 GMT


- Update network
  It returns 401 when giving a wrong token.

    $ neutron net-list
    +--------------------------------------+----------+----------------------------------------------------------+
    | id                                   | name     | subnets                                                  |
    +--------------------------------------+----------+----------------------------------------------------------+
    | 0d4af632-5e88-4d9a-a155-3f1a64a49986 | private4 | a0a928f1-e057-4ecd-99d6-659fe2c950c5 fdc6:3c3c:39a7::/64 |
    |                                      |          | a9d8ad08-71f9-4a7b-82f1-9005ff24e7c1 10.0.0.0/24         |
    | ae75fb2a-c44f-4e85-a1b5-c2b79bd79dab | public   | c2c2c941-c315-43b3-8318-73adff030aad 172.24.4.0/24       |
    |                                      |          | e8cb68cf-f0ad-4d7e-a0b3-2c56d35f01ce 2001:db8::/64       |
    +--------------------------------------+----------+----------------------------------------------------------+
    $ curl -i -X PUT -H "x-auth-token: dummy" -H "content-type:application/jason" -d '{"network":{"name":"private5"}}'  http://192.168.122.111:9696/v2.0/networks/0d4af632-5e88-4d9a-a155-3f1a64a49986
    HTTP/1.1 401 Unauthorized
    Content-Type: text/html; charset=UTF-8
    Content-Length: 23
    Www-Authenticate: Keystone uri='http://192.168.122.111:5000'
    X-Openstack-Request-Id: req-f702bf41-98f6-4e6a-8a47-500415120d7e
    Date: Thu, 23 Jul 2015 12:06:28 GMT

  It returns 401 when giving a bad request body.

    $ curl -i -X PUT -H "x-auth-token: $TOKEN" -H "content-type:application/jason" -d '{"network":{"dummy":"private5"}}'  http://192.168.122.111:9696/v2.0/networks/0d4af632-5e88-4d9a-a155-3f1a64a49986
    HTTP/1.1 400 Bad Request
    Content-Length: 106
    Content-Type: application/json; charset=UTF-8
    X-Openstack-Request-Id: req-b9d86ae9-6b71-4a30-82d2-08637ba12f4f
    Date: Thu, 23 Jul 2015 12:08:37 GMT

  It returns 404 when giving a wrong network-id.

    $ curl -i -X PUT -H "x-auth-token: $TOKEN" -H "content-type:application/jason" -d '{"network":{"name":"private5"}}'  http://192.168.122.111:9696/v2.0/networks/dummy
    HTTP/1.1 404 Not Found
    Content-Length: 154
    Content-Type: text/html; charset=UTF-8
    X-Openstack-Request-Id: req-72d35342-f42c-4e23-9e82-f0aa42731242
    Date: Thu, 23 Jul 2015 12:09:40 GMT


- Delete network
  It returns 401 when giving a wrong token.

    $ neutron net-list
    +--------------------------------------+----------+----------------------------------------------------------+
    | id                                   | name     | subnets                                                  |
    +--------------------------------------+----------+----------------------------------------------------------+
    | 0d4af632-5e88-4d9a-a155-3f1a64a49986 | private4 | a0a928f1-e057-4ecd-99d6-659fe2c950c5 fdc6:3c3c:39a7::/64 |
    |                                      |          | a9d8ad08-71f9-4a7b-82f1-9005ff24e7c1 10.0.0.0/24         |
    | ae75fb2a-c44f-4e85-a1b5-c2b79bd79dab | public   | c2c2c941-c315-43b3-8318-73adff030aad 172.24.4.0/24       |
    |                                      |          | e8cb68cf-f0ad-4d7e-a0b3-2c56d35f01ce 2001:db8::/64       |
    +--------------------------------------+----------+----------------------------------------------------------+
    $ curl -i -X DELETE -H "x-auth-token: dummy" http://192.168.122.111:9696/v2.0/networks/0d4af632-5e88-4d9a-a155-3f1a64a49986
    HTTP/1.1 401 Unauthorized
    Content-Type: text/html; charset=UTF-8
    Content-Length: 23
    Www-Authenticate: Keystone uri='http://192.168.122.111:5000'
    X-Openstack-Request-Id: req-bff58281-c2e1-4ea1-98de-d091dc413717
    Date: Thu, 23 Jul 2015 12:10:56 GMT

  It returns 404 when giving a wrong network-id.

    $ curl -i -X DELETE -H "x-auth-token: $TOKEN" http://192.168.122.111:9696/v2.0/networks/dummy
    HTTP/1.1 404 Not Found
    Content-Length: 154
    Content-Type: text/html; charset=UTF-8
    X-Openstack-Request-Id: req-c9371145-200f-41ce-97e7-87b46b28023b
    Date: Thu, 23 Jul 2015 12:12:06 GMT

  It returns 409 when the network already has a port.

    $ curl -i -X POST -H "x-auth-token: $TOKEN" -H "content-type:application/jason" -d '{"port":{"network_id":"0d4af632-5e88-4d9a-a155-3f1a64a49986"}}'  http://192.168.122.111:9696/v2.0/ports
    HTTP/1.1 201 Created
    Content-Type: application/json; charset=UTF-8
    Content-Length: 747
    X-Openstack-Request-Id: req-9dc471ac-2fb0-4798-84e1-fb82fb34b94e
    Date: Thu, 23 Jul 2015 12:13:14 GMT
    <snipped>
    $ curl -i -X DELETE -H "x-auth-token: $TOKEN" http://192.168.122.111:9696/v2.0/networks/0d4af632-5e88-4d9a-a155-3f1a64a49986
    HTTP/1.1 409 Conflict
    Content-Type: application/json; charset=UTF-8
    Content-Length: 205
    X-Openstack-Request-Id: req-b649e00b-2b06-4c37-a4d9-3de8725fbd3d
    Date: Thu, 23 Jul 2015 12:13:24 GMT