What layer is WiFi?
All Wireless LANs operate on the Physical and Data Link layers, layers 1 and 2. All Wi-Fi systems use these layers to format data and control the data to conform with 802.11 standards. Medium arbitration-controlling when the AP can access the medium and transmit or receive data-is done at these two layers.
Where is UDP used?
UDP is commonly used for applications that are “lossy” (can handle some packet loss), such as streaming audio and video. It is also used for query-response applications, such as DNS queries.
Is port 53 secure?
The DNS protocol – operating on UDP port 53 for normal requests – is used as a means of “tunnelling” through security systems to steal data. The channel is not normally used for sending information and so is not always monitored by security systems.
Does SNMP use UDP?
SNMP is a request/response protocol. UDP port 161 is its well-known port. SNMP uses UDP as its transport protocol because it has no need for the overhead of TCP. The request and response messages that SNMP sends in the datagrams are called Protocol Data Units (PDU).
Is SNMP a TCP or UDP?
It is an application layer protocol in the OSI model framework. Typically, the SNMP protocol is implemented using the User Datagram Protocol (UDP). UDP is a connectionless protocol that works like the Transmission Control Protocol (TCP) but assumes that error-checking and recovery services are not required.
Is SNMP still used?
Sadly, SNMP is still in common usage. Later versions of the protocol have addressed numerous issues in SNMPv1, but those have almost entirely been directed at fixing the security model.
Does SMB use UDP?
The SMB protocol relies on lower-level protocols for transport. The Microsoft SMB protocol was often used with NetBIOS over TCP/IP (NBT) over UDP, using port numbers 137 and 138, and TCP port numbers 137 and 139. SMB/NBT combination is generally used for backward compatibility.
Is port 445 TCP or UDP?
Port 445 Details
| Port(s) | Protocol | Service |
|---|---|---|
| 445 | tcp | microsoft-ds |
| 445 | tcp | |
| 445 | udp | |
| 445 | tcp | trojan |
Does Windows use SMB or NFS?
Server Messaging protocol (SMB) is the native file sharing protocol implemented in Windows systems. SMB uses share level and user level security to authorize access to file shares. The Network File System (NFS) protocol is used by Linux systems to share files and folders.
Which is faster NFS or CIFS?
CIFS is a Windows-based network in file sharing and is used in devices that run on Windows OS. CIFS was introduced as the public version of Server Message Block which was invented by Microsoft….Difference between NFS and CIFS :
| Basis of | NFS | CIFS |
|---|---|---|
| Speed & Scalability | Highly scalable and more speed than CIFS | Low scalable and moderate speed |
What does SMB stand for?
Server Message Block