What is SYN message in TCP?
A TCP request for initiating a connection:
- step 1: a connection request from a client to a server (the client sends a TCP packet with the SYN flag set);
- step 2: server response (the client is sent a packet with SYN and ACK flags set);
- step 3: acknowledgment of the client’s readiness to establish the connection (the server is sent a packet with the ACK flag set).
The connection is deemed to be established if all the 3 steps (the so-called TCP three-way handshake) have been successful.
Other terms in this category
Data centerColocationWAFDoS (Denial of Service)DDoS (Distributed Denial of Service)Smurf AttackHostingDedicated ServerVPS/VDSDNS hostingWhat is a GET Request?SSL trafficWhat Is a SYN Flag?What are SYN cookies?Zero Day (0day DDoS) attackWhat is a domain name?BandwidthWhat is a router?What is a server?TrafficRound-Trip Time, RTTInternet Protocol, IPLink bandwidth, link throughputTCP window sizeWhat are cookies?What is a CVE?What Is an Exploit?HacktivismWhat is Proxying?Content Delivery Network, CDNAttack amplificationBotAttacks against websitesWhat is the 95th percentile?What is TLS fingerprinting?TCP handshakeDNSBL (DNS Blacklists)MAC (Media Access Control) address or physical addressDoS (Denial of Service)IP addressProxy serverFirewallP2P networkCloud Hosting
We use cookies to make the site faster and more user-friendly. By continuing to use the site you agree to our Privacy Policy