Solution:  A JavaScript engine is a program or an interpreter which executes JavaScript code. The interpreter can be shared with other properties, or embedded in other tools.

Solution: The total size of the page is important, not just because of the time it takes to download, but because the maximum size of an IP packet is 65535 octets for IPv4 and IPv6.

Solution: The two most common methods of http are get and post. Once the TCP/IP connection has been established, the browser sends an HTTP GET request over the connection to the remote server. The remote server finds the resource and returns it in an HTTP Response, the status of which is 200 to indicate a good response.

Solution: The remote server finds the resource and returns it in an HTTP Response, the status of which is 200 to indicate a good response. 400 status code is used to indicate a bad request.

Solution: The Network Access Layer is the lowest layer of the TCP/IP protocol hierarchy. The Network Access layer controls the communication between the hardware in the network.

Solution: The internet layer is a group of internetworking methods, protocols, and specifications in the Internet protocol suite that are used to transport network packets from the originating host across network boundaries. The Internet layer handles network addressing and routing, getting IP and MAC addresses.

Solution: The transport layer is the layer in the open system interconnection (OSI) model responsible for end-to-end communication over a network. The Transport layer is where our TCP (or UDP) communication takes place.

Solution: An application layer is an abstraction layer that specifies the shared communications protocols and interface methods used by hosts in a communications network. The Application layer handles the top-level communication that the client and servers use, like HTTP and SMTP for email clients.

Solution: TCP stands for transmission control protocol which controls the transmission of data over the internet. This handshake consists of a Synchronize, Synchronize-Acknowledge, and Acknowledge message to be passed between the browser and the remote server. This handshake allows the client to attempt communication, the server to acknowledge and accept the attempt, and the client to acknowledge that the attempt has been accepted.

Solution: TCP stands for Transmission Control Protocol. The TCP/IP model is a concise version of the OSI model. The four layers in the TCP/IP model are, in order from farthest to closest to the end user, the Network Access layer, the Internet layer, the Transport layer, and the Application layer.