pdu ccna

Concept: 1. Neighbor table: The address of the direct-attached router and the interface to which it is connected 2. Topology table: A. Routing Status: P (passive) a (activity) B. Feasible distance (FD): Minimum metric to destination (metric) C.

1. Abbreviations 1) sndcp: subnetworkdependence converage protocol, subnet-related aggregation Protocol 2) nsapi: Network Layer Service Access Point identifier. The identifier of the network layer service access point is actually an index of the PDP context of the service using the sndcp layer, the Service Access Point provided by sndcp to the upstream layer; 3) SAPI: the service access point provided by LLC to the upstream Layer 3）Qos：quality ofservice 4）BSS：Base StationSystem 5）SGSN：Service G

2 message sending// User information encoding method# Define gsm_7bit 0# Define gsm_8bit 4# Define gsm_ucs2 8// Short Message Parameter structure, shared encoding/Decoding// The string ends with 0.Typedef struct {Char SCA [16]; // Short Message Service Center number (SMSC address)Char TPA [16]; // target number or reply number (TP-DA or TP-RA)Char tp_pid; // User Information Protocol identifier (TP-PID)Char tp_dcs; // user information encoding method (TP-DCS)Char tp_scts [16]; // service timesta

describe the conceptual interfaces between subsystems in the SNMP entity. They tend to help describe the external visible behaviors of the SNMP entity rather than constrain the structure or organization of internal execution, an abstract service interface cannot be considered an API. It is defined by a set of primitives that define the provided services and abstract data elements. (1) DISPATCHER primitives (Scheduler primitive) A typical function of a scheduler is to provide services for SN

Chapter 2 Bluetooth Roles-Broadcaster1.1 broadcast type You can set the following types for broadcast: 1) connectable undirected Event Type) 2) connectable directed event type (connectable) 3) scannable undirected event type (no targeted broadcast can be scanned) 4) Non-connectable undirected event type (non-connectionless broadcast) The so-called targeting and untargeting are for broadcast objects. If it is for a specific object broadcast (the PDU i

TDATA[0];} l2cap_conf_rsp;typedef struct {l2cap_pdu_hdr_format com_hdr;uint8_tdata[0];} L2cap_upper_layer_data_format;typedef struct {L2cap_sig_hdr_format com_hdr;uint16_tdcid;uint16_tscid;} l2cap_discon_req;typedef struct {L2cap_sig_hdr_format com_hdr;uint16_tdcid;uint16_tscid;} L2CAP_DISCON_RSP; #pragma pack ()/* API *//* send PDU */int l2cap_send_sig_con_req (uint8_t ident,uint16_t psm,uint16_t SCID); int l2cap_send_sig_conf_req (uint8_t ident,uin

= SnmpConstants. version1; public final static int version2c = SnmpConstants. version2c; public final static int version3 = SnmpConstants. version3;/*** constructor * @ param version */public SnmpManager (int version) {this. version = version; try {// set Udp transportMapping = new DefaultUdpTransportMapping (); snmp = new Snmp (transportMapping); if (version = version3) {// set the Security Information USM usm = new USM (SecurityProtocols. getInstance (), new OctetString (MPv3.createLocalEngin

PHP through the serial text message, PHP serial text message With the progress of technology, the field of text messaging has produced three modes in time: BLOCK mode, the text mode based on the AT command, and the PDU mode based on the AT command. The TEXT mode is relatively simple, and a variety of Nokia phones support this model. Most Siemens phones only support PDU MODE.

PHP sends SMS via serial port With the progress of technology, the field of text messaging has produced three modes in time: BLOCK mode, the text mode based on the AT command, and the PDU mode based on the AT command. The TEXT mode is relatively simple, and a variety of Nokia phones support this model. Most Siemens phones only support PDU MODE. PDU mode is a met

The experiences of successful users are undoubtedly very important to us, because they not only know the road to success, but also know the road to failure, these experiences are of great reference value to latecomers. Friends who have already passed ccna are very willing to share their experiences with you. Some netizens collected some experiences and sorted them out, hoping they could help those who are preparing for the

+ bluetooth_base_uuidBluetooth_base_uuid = 00000000-0000-1000-8000-00805F9B34FB A simpler approach is as follows (XXXX stands for 16-16-bit UUID)0000xxxx-0000-1000-8000-00805f9b34fb Tip:16-bit Attribute UUIDs with SDP 16-bit UUIDs using the same namespace 2.2 Attribute Handle Attribute handle is a unique and non-zero 16-bit value assigned by the server0x0000: Reserved0xFFFF: Max Attribute Handle 2.3 Attribute Handle Grouping Grouping is a set of attributes defined by a high-level protocol that

Translated from: Example Key words: SNMP, MIB, OID, agent, NMs Abstract: With the rapid development of network technology, the number of network devices is increasing, and the types of devices are also diverse. How can we effectively manage these devices? We can achieve this through the SNMP function. This article focuses on the basic concepts, working principles, and main applications of SNMP. Abbreviations: Abbreviations Full English name Explanation MiB Manageme

);}The sendText () method of the IccSmsInterfaceManager object calls the sendText () method of the SMSDispatcher class and continues:5. Stage 4: SMSDispatcher. java (frameworks/base/telephony/java/com/android/internal/telephony/SMSDispatcher. java) This class is an abstract class, and its sendText () is not implemented. Its implementation class is GsmSMSDispatcher. java or CdmaSMSDispatcher. java. If we use a GSM network, the sendText () method of the GSM smsdispatcher is called. 6. Stage 5: Gs

of Subagents.Forwarding subagents messages2, SubagentAn entity acting in a subagent role performs the following functions:-Initiates AGENTX sessions with the master agent.Initializing A session with the master side-Registers MIB regions with the master agent.Registering the MIB library with the master side-Instantiates managed objects.Instantiating an Object-Binds OIDs within its registered MIB regions to actualVariables.Binding objects-Performs management operations on variables.Implementing M

classes and interfacesSNMP class: This class is the most core class in snmp4j. Responsible for receiving and sending SNMP messages.PDU classes and SCOPEDPDU classes: This class is an abstraction of the SNMP message unit, where the PDU class applies to SNMPV1 and snmpv2c. The Scopedpdu class inherits from the PDU class and is suitable for SNMPv3.The target interface and the Usertarget class: address informa

Original article: http://blog.csdn.net/bhw98/archive/2003/03/27/19666.aspx We need to understand the SMS specification developed by ESTI. The rules related to short message sending and receiving discussed mainly include GSM 03.38, GSM 03.40, and GSM 07.05. The first two focuses on the technical implementation of SMS (including the encoding method), the latter sets out the DTE-DCE interface standard of SMS (AT command set ).There are three methods to send and receive SMS messages: block mode, tex

: m-send : MMS client sends message to MMS Proxy-relay server; The M-send service provides the basic mechanism for MMS client to submit multimedia MMS to Mms-relay and obtain response information, the following figure is the communication flow of the business: In the PDU (Protocol Data unit) that MMS client submits to MMS relay, it contains an ID field that uniquely identifies itself, which causes the request/response (REQ/RESP) to be correlated. When

as follows. After the configuration is complete, you can test the connectivity with router R1 on router R2, as shown in Figure 8.34, which indicates the communication effect after two-way authentication is successful. Configuration of two-way PAP authentication on vror2 R2: R2 (config) # username r1 password cisco R2 (config) # inte s1/0 R2 (config-if) # ipaddress 192.168.3.2 255.255.255.252 R2 (config-if) # encapsulationppp R2 (config-if) # pppauthentication pap R2 (config-if) # ppppap sent-us

static int version1 = Snmpconstants. Version1; Public final static int version2c = SNMPCONSTANTS.VERSION2C; Public final static int version3 = Snmpconstants. Version3; /** * Construction Method * @param version */public snmpmanager (int version) {this. Version = version; try {//Set to UDP protocol transportmapping = new defaultudptransportmapping (); SNMP = new SNMP (transportmapping); if (Version = = Version3) {//set security Information U

SDU (Service data Unit): The data unit, also called the Business Data Unit, is a dataset of the user service of the specified layer, and when the same protocol layer is transmitted to the receiver, the data is not changed, that is, the business part is then sent to the lower layer and the lower layer is encapsulated in the PDU. A Service data unit is a unit of information sent from a high-level protocol to a lower layer protocol. The nth tier service