ip internet protocol

ICMP is considered a part of the IP layer, which transmits error messages and other information that requires attention. ICMP packets are often used by the IP layer or higher protocol (TCP/UDP) (some error messages are returned to the user process ). ICMP packets are transmitted inside IP datagram. For example, the for

Label:IMAP (Internet Mail access protocol,internet) is formerly known as the Interactive Mail Access Protocol (Interactive mail, Access Protocol). IMAP was an email acquisition protocol developed by Stanford University in 1986. It

then the MAC address. 4.2 IP protocol The protocol that specifies the network address is called the IP protocol. The address defined by it is called an IP address. Currently, the fourth version of the

The IP protocol is the most important protocol in the family of TCP/IP protocols, which provides unreliable, non-connected datagram transport services. So understanding IP protocols is critical to our learning network.IP headerImportant Field Introduction：4bit First minister

broadcast package will query their own IP addresses. If a host that receives the broadcast package finds that it meets the conditions, prepare an ARP packet containing your MAC address and send it to the host that sends the ARP broadcast, the broadcast host will update its ARP cache after obtaining the ARP package (that is, the place where the corresponding table of the IP-MAC is stored ). The host that se

Put these three protocols together because the three protocols are on the same level, the ARP protocol is used to locate the target host's Ethernet NIC MAC address, and the IP hosts the message to be sent. The data link layer can get the data transfer information from ARP, and the data to be transmitted from IP.1.IP pr

Digression: Originally wanted to follow the internet level from the bottom up review these agreements, but today really have to break the case, DHCP has to say!Host from one network to another network, then the structure of IP address will change, today's mainstream has the following several modification scenarios:(a) Change of address:The host changes its address when moving to a new network, where a DHCP

:0000515c020002006162636465666768696a6b6c6d6e6f7071727374757677616263646566676869Type: 00-loopback AnswerCode: 00Checksum (Checksum): 5cLogo Identifier (BE) Identifier (LE):Ordinal Sequence number (BE), Sequence numbers (LE):Optional data (Date):6162636465666768696a6b6c6d6e6f7071727374757677616263646566676869(5) ICMP echo request message 1 for 202.202.96.35 (Southwest University Homepage):08003e5c02000d006162636465666768696a6b6c6d6e6f7071727374757677616263646566676869Type (type): 08-Echo Request

address mask request and reply messageICMP timestamp request and reply messageICMP Unreachable messageICMP echo Request and ECHO Response message formatICMP super-Times articleICMP Redirect MessageICMP router Request message formatICMP Router Advertisement message formatError message format for ICMP Source station suppressionICMP Type:The ICMP error reporting message should not be sent: ICMP error Reporting messages are not sent for all subsequent datagrams of the first Shard's data sh

which port to forward this data to by the destination MAC address. Instead of being forwarded to all drop ports, like the hub. Therefore, the switch is able to divide the conflict domain drops.Network layerFour main protocols: Internet Protocol IP: Responsible for addressing and routing packets between host and network. Address Resolution

0 hopopt IPv6 Jump option 1 ICMP Internet control messages 2 IGMP Internet Group administration 3 GGP Gateway to Gateway 4 IP (encapsulated) in IP IP 5 ST Stream 6 TCP Transmission Control 7 CBT CBT 8 EGP External Gateway Protoco