What is my PPTP?
Stands for “Point-to-Point Tunneling Protocol.” PPTP is a networking standard for connecting to virtual private networks, or VPNs. It allows one point (the user’s computer) to access another specific point (a remote network) over the Internet. …
What is GRE in PPTP?
The Generic Route Encapsulation (GRE) protocol is used in conjunction with PPTP. Data or payload that is going to pass through the tunnel is given a Point-to-Point Protocol (PPP) header and then placed inside a GRE packet. The GRE packet carries the data between the two tunnel endpoints.
How is PPTP used?
PPTP encapsulates the encrypted and compressed PPP packets into IP datagrams for transmission over the Internet. These IP datagrams are routed over the Internet until they reach the PPTP server that is connected to the Internet and the private network.
Which of the following is a weakness of PPTP?
Of all the protocols, PPTP has the lowest level of encryption. Even Microsoft recommends that people stay away from PPTP because, from a security standpoint where encryption is key, PPTP is extremely unsafe. That said, if your only concern is speed, then PPTP is the protocol for you.
Is PPTP insecure?
Not only is it easier, it’s faster than other built-in protocols like L2TP/IPSec, SSTP, and IKEv2. But PPTP is widely regarded as obsolete. Microsoft developed and implemented it as far back as Windows 95 and Windows NT.
What ports are needed for PPTP?
Point-to-Point Tunneling Protocol (PPTP) uses TCP port 1723 and IP protocol 47 Generic Routing Encapsulation (GRE). PPTP provides a low-cost, private connection to a corporate network through the Internet.
What is an IPv4 header?
An IPv4 header is a prefix to an IP packet that contains information about the IP version, length of the packet, source and destination IP addresses, etc. It consists of the following fields: Total length – the length of the entire packet (header + data). The minimum length is 20 bytes, and the maximum is 65,535 bytes.
What is the minimum required field size of an IPv4 header?
Minimum required field size of IPv4 header is 20 bytes. Minimum required length of an IPv4 header is five 32-bit words (5*32 = 160 bits or 20 bytes). The length of required fields in IPv4 header is 20 bytes.
What is the bit pattern of IHL field in IPv4 header?
The bit pattern of is IHL field in IPv4 header is 0101, which is equal to five in decimals. Please refer below image to understand the meaning of 32-bit words of IPv4 header.
What is the size of IHL in IPv4?
Internet Header Length: IHL is the 2 nd field of an IPv4 header, and it is of 4 bits in size. This header component is used to show how many 32-bit words are present in the header.