sdn protocols

, we can access the class by means of the protocol, without knowing the source code of the class.11. The protocol is defined using the @protocol Directive and the @end directive, where only a few methods can be declared. The declared method is @required type by default, that is, the class that adheres to this protocol must be implemented. If there are options to implement , use @optional to define. The template is defined in the H file as follows:@protocol Xprotoc...//method list name, declared

Network layer—The IP protocol belongs to the network layer of the network protocol stack. The functional goal of this layer is to transfer packets from one location in the network to another, which is the lowest level of processing end-to-end transmission. In the middle of the transfer process passes through many hop (hop) intermediate routers, so the routing algorithm is the core task of its design. (but unfortunately not the core task of this article) Tunnel—When two of the same networks are s

Code:@import Foundation;/**************************************** * Person class ****************************************///to adopt a protocol, you need to list the name of the Protocol in the Declaration of the class and enclose it in angle brackets .//With multiple protocols, the names of the protocols are separated by commas, such as: //multiple protocols can

Analysis plan of RIP routing protocols V1 and V2 is as follows: R1 connects to the Internet through a port and uses loopback to simulate the IP address of the host carrying the router R1: lo 0: 10. 1.1.1/24 f0/0: 192.168.0.1 www.2cto.com R2: lo 0: 10. 1.2.1/24 f0/0: 192.168.0.2 configuration: R1 R1 (config) # int lo 0R1 (config-if) # ip add 10.1.1.1 255.255.255.0R1 (config-if) # int f0/0R1 (config-if) # ip add 192.168.0.1 255.255.255.0R1 (config-if) #

It is very important to know about dynamic routing protocols. Here we mainly introduce how dynamic routing protocols save network bandwidth and manage network bandwidth. In a network without other routers, it is meaningless to route the Broadcast Communication outbound from the network interface. This is very inefficient for your network bandwidth and vro resources. Let's take a look at how to use the passi

There are many open source agreements that exist today, and there are currently 58 types of open source agreements approved by the Initiative Organization (Http://www.opensource.org/licenses/alphabetical). Our common open source agreements such as BSD, GPL, lgpl,mit, etc. are all OSI-approved protocols. If you want to open up your own code, it's best to choose these approved open source protocols. Here we

ISUP, namely encapsulation and ing, which are defined by RFC3204 and RFC3398 respectively. However, the SIP-T only focuses on the intercommunication of basic calls, while the supplementary business is basically not involved. 2. ITU-T protocols for SIP-I The SIP-I (SIPwithEncapsulatedISUP) protocol family includes the ITU-TSG11 workgroup TRQ.2815 and Q.1912.5. The former defines the technical requirements for intercommunication between SIP and BICC/IS

IP route selection protocols can be divided into classless routing and classless routing. Route Selection Updates sent by the classless Routing Protocol do not contain subnet mask information, such as r12001; Route Selection Updates sent by the classless routing protocol include subnet mask information, such as r00002, VPN, OSPF, IS-IS and BPG. 1. classless Routing Protocol When a class protocol was initially developed, the network used was quite diff

may depend on the number of forwarding times between nodes, the current network running status, data transmission rate, and topology. To find the optimal path, Each router needs to communicate with each other through the routing protocol. The routing protocol is only used to collect data about the current status of the network and find the optimal transmission path. Based on the data, the router can create a route table for future packet forwarding. In addition to the ability to find the optim

itself does not provide data encryption or identity authentication. Srtcp can be used for such purposes. SRTP srtcp Reference rfc3711 Secure real-time transmission protocol (secure real-time transport protocol or SRTP) is a protocol defined based on the real-time transport protocol or RTP, the aim is to provide encryption, message authentication, integrity assurance and replay protection for data in real-time transmission protocols in unicast and m

practice is to omit the vehicle_ext.h file, but add the content directly to the front of the vehicle. M file @ implementation. ----------------------------------------------------------------------------- Protocol) Based on nsobject, a category is created for nsoject. When a category is created, a new method for this category is specified to implement informal protocols. For classes that implement informal

About I2C and SPI bus protocols Iicvs SPI Currently, in the low-end digital communication application field, we can see IIC (Inter-Integrated Circuit) and SPI (serial peripheral interface) everywhere. The reason is that these two communication protocols are very suitable for close-range and low-speed chip communication. Philips (for IIC) and Motorola (for Spi) have developed these two standard communication

Analysis of the three common network protocols TCP/IP is undoubtedly one of the most important of the three protocols. As the basic protocol of the Internet, it is impossible to access the Internet without it, any Internet-related operations are inseparable from the TCP/IP protocol. However, the TCP/IP protocol is also the most troublesome configuration among the three