| Vulnerabilities and Possible Attacks Against the GPRS Backbone Network Recent countries visiting this post |  |
 | 4 | United States |
 | 1 | Japan |
 | 1 |
| Vulnerabilities and Possible Attacks Against the GPRS Backbone Network Recent countries visiting this post | |
| 4 | United States |
| 1 | Japan |
| 1 |