2021年7月26日 · @joseph: nope! Port numbers are a thing for tcp and udp, but icmp is a separate protocol at the same level; it's distinguished as protocol 1 in the protocol field of the IP packet (tcp and udp are 6 and 17 respectively).

2011年5月4日 · Ping is at network layer (or Internet layer - Have a look to ICMP protocol like pointed out by @ServerMonkey). Arp protocol is at link level (a lower level). Arp protocol is designed to allow physical connection between network hardware, that is directly connected.

Ping will use ICMP protocol, it belongs to TCP/IP Internet Layer, which is a lower layer than HTTP or HTTPs (from Application Layer): Ping operates by sending Internet Control Message Protocol (ICMP) echo request packets to the target host and waiting for an ICMP response.

2014年11月18日 · When you send a ping request, it uses the ICMP protocol at the network layer (Layer 3). Ports are only a concept of the transport layer (Layer 4), so a ping does not know anything of ports, nor does it need to. Specifically, it uses the echo reply message in ICMP and waits for a response.

This is explained in detail in the Wikipedia article about Ethernet frames, in particular the section about Ethernet frame types – Ethernet II ("DIX") frames have a "Type" field, but some networks (in particular the now-obsolete IPX) used to use IEEE 802.3 framing, which has "Packet size" instead, and uses separate 'LLC' (802.2) or even 'LLC ...

2020年12月29日 · Not directly. ICMP is IP protocol 1, TCP is IP protocol 6. Other common IP protocols are 17 (udp) and 47 (gre). In other can we guaranty their arrival in the network. Typically ICMP is not sent within any type of framework that uses acknowledgements and timeouts like TCP does. So the answer here is no.

2015年11月18日 · Proxies are protocol specific. ping uses the ICMP protocol - I've never heard of ICMP proxies but it's not impossible to have one. Web browsers use HTTP. So if an HTTP proxy is down, ping and things using other protocols will work - unless there is a firewall that only allows traffic going through the proxy out. –

You can ‘tunnel’ ICMP over UDP, in which case the protocol number of the protocol running directly atop of IP would be 0x11, the protocol number of UDP. So normally one has IP < ICMP or IP < UDP or IP < TCP, but if you use UDP for ICMP, you have IP < UDP < ICMP~. –

2018年7月2日 · When one says "Ping", they refer to ICMP ping, as that is what the original ping is. ICMP actually works on a lower level than the UDP & TCP transport protocols and does not use ports[ 1 ]: ICMP, uses the basic support of IP as if it were a higher level protocol, however, ICMP is actually an integral part of IP, and must be implemented by every ...

In Protocol and ports (chosen in the left panel): Protocol: ICMPv4. In the same panel, press button Customize, choose "Specific ICMP types", check the box "Echo Request", and press button OK. In Name (chosen in the left panel): fill in the Name field and press Apply.