It stores the competent HLR transmitted information (including authentication data, International Mobile Station Identity (IMSI) number, agreed services) on the area of its competence entering the mobile subscriber and thereby enables the MSC to connect. VLR controls mobile recharge offers among others the allocation of the roaming number of the mobile stations (MSRN) and the TMSI. Crossing a mobile subscriber several common areas of the MSC, is also VLR updated through special dialogue. The same applies when changing. Through the VLR a frequent query the HLR is avoided. HLR and VLR are used for TN management and are among the features of the update Occupied zone (Location Update) and connection involved. That Program makes copies of all visible packets leaving the exporting computer or arrive with him.
Wireshark is always running on only one network card, ex on the WLAN Interface or on the Ethernet card). As in the laboratory tests mobile recharge offers exclusively for use WLAN comes, the type of visible packets depends on the selected mode (Mode). In Monitor Fashion (see section 3.2), most package types are visible, since, for example, WLAN Management packages such as Access Point Beacon frames, recorded with Wireshark. Wireshark knows the standard structure of the packet header of many types of logs and provides automatically correctly according to the layer in the OSI model represents. Package only information the layer1 and2 include, so this api recharge list may be because the upper layers through WLAN encrypts were (WEP, WPA2). In order to avoid this, in some experiments the WLAN Encryption on the Access Point is turned off.
Characteristic of Wireshark is the two part structure of the main window. In the top list you will find all the captured packets. About the various columns let by itself Arrival, protocol, packet size, etc. Order. In the main window mobile recharge offers also have various filters Set to display only certain types of packages. If you want, for example, only packages of Show ICMP protocol, they should be collected in the filter row “ICMP” and confirm the entry with “Apply”. In the list below you can see the features of each packet, and the header content each layer.
If you click twice, so open in the top list on a package is the same View in a separate window. In addition to the features mentioned here briefly provides Wireshark many other analytic tools, such For example, the bandwidth measurement or the display of TCP flow control. The focus Wireshark is on the protocols of layer3 and 4. FIG. Decision 1987 on a prototype based on the CEPT Decision (Conference Européennes the Administrations yes Posted et yes Telecommunications) for a digital cellular Radio system in the frequency band at 900 MHz. September 7, 1987 13 European countries sign an MoU (Memorandum of Understanding On the Introduction of the PanEuropean mobile recharge offers Digital Mobile Communication Service) Declaration ton for the introduction of digital mobile communications using the GSM api recharge list standard. May 1989 acquisition of the GSMWorking Group by the ETSI as Special Mobile Group (SMG).
Abbreviation GSM stands today because of global standards for Global System for Mobile Communications. Meanwhile, all European countries and many countries around the world have the GSM MoUVertrag signed and will build a GSM system. Start GSM July 1, 1991 Standard GSM recommendation 13 series providing detailed specifications for the radio interface, modeled on analog cellular standard national and ITUTS X.25, adapted to ISDN, IP, however, specific to the GSM system. Mobile (radio) station (MS, Mobile Station) Total physical equipment of the PLMN subscriber, includes radio and user interface for accessing the TN on PLMN services. GSM mobile station consists of2 parts 1st part all specific to the radio interface hardware mobile recharge offers and software components, 2nd part (socalled Subscriber Identity Module (SIM).) All user specific information.
