Java Network Programming - Mastering TCP/IP : CJNP+ JAVA+

Learn how ARP maps IP addresses to MAC addresses using broadcast requests and responses, updating the local ARP table for efficient local network communication.

Explore how IPv4 enables inter-network communication with 32-bit addresses and dot quad notation, as defined by RFC 791. Learn IPv4 headers, netmasks, and CIDR for routing and addressing across networks.

Master time to live TTL and IP fragmentation by analyzing real network packets with Wireshark, and learn how TTL and hop counts govern routing behavior.

Explore how TCP delivers reliable, ordered data via a connection-oriented header structure, with ports and RFC 793 concepts underpinning HTTP, HTTPS, FTP, SSH, and SMTP.

Analyze tcp traffic with wireshark by dissecting tcp packets, flags, and the three-way handshake, and observe a tls encrypted https session on port 443 with rtt and window size.

Discover how udp, a connectionless, best-effort transport defined by rfc 768, enables low-latency real-time data with an eight-byte header and no guaranteed delivery for dns, voip, streaming, and online gaming.

Analyze UDP traffic with Wireshark to understand DNS queries and responses over port 53, including transaction IDs, and interpret frames, IP addresses, and round-trip time.

Explore dynamic host configuration protocol (dhcp) fundamentals and hands-on packet analysis with Wireshark, covering discovery, offer, request, acknowledge, and related options like lease time, subnet mask, and dns servers.

Explore the http protocol structure, including request and response formatting, methods like get, post, and delete, and the role of headers and entity data in web communication.

Explore HTTP packet analysis to learn how browsers request login pages and resources, how servers respond with HTTP 200, and how headers, keepalive, and gzip compression influence delivery and encryption.

Develop Java applications that connect with other services across a network, using a wide range of Java networking options to choose the appropriate technology.

Inter networking uses standards to share data across dissimilar networks and nodes. It enables data access among different systems, software, and operating systems, with medical data speeding diagnoses.

Explore how local area networks, metropolitan area networks, and wide area networks enable global data sharing over the Internet, highlighting the convergence of voice, text, and teleconferencing.

Explore local area networks that connect computers, printers, storage, and other devices over copper, fiber, or wireless media, using protocols for fast data sharing in homes, offices, and labs.

Explore metropolitan area networks that span beyond a LAN, enabled by fiber optic technology and devices, and use fiber distributed data interface as the backbone connecting network segments over kilometers.

Discover how wide area networks enable global communication and information sharing across geographic locations, from enterprises to everyday internet use.

Explore the fundamentals of computer networking, define a network and nodes, and examine how network protocols manage connections, addressing, flow control, ordering, error handling, and data encoding.

Explore the four-layer tcp/ip model and the internet protocol suite, covering link, internet, transport, and application layers with tcp/udp, ipv4/ipv6, http, smtp, and dns.

Describe how emails travel over the internet using a layered model, focusing on the application and the link layers, SMTP/POP3/IMAP protocols, content parsers, and the user interface.

Explain how the protocol data unit stacks payloads with headers and footers across the tcp/ip layers, detailing tcp/udp headers, ports, ipv4 and ipv6 addresses, mac addresses, and the resulting frame.

Explore how data moves from one node to another, using ip encapsulation, arp for mac addresses, and switching at the link layer.

Learn how IP routing over multiple networks overcomes direct Ethernet connectivity limits by using routing tables, ARP, and encapsulating IP packets in Ethernet frames across routers via the default gateway.

Learn to resolve a domain to an IP address using InetAddress class in java.net by getByName, then obtain the host address, canonical host name, and host name, while handling UnknownHostException.

Learn the Java NIO basics—buffers, channels, and selectors—and how a single thread handles multiple channels for scalable network access, including file, datagram (UDP), socket (TCP client), and server socket channel.

Access a website's code by creating a URL and opening a URLConnection, then read HTML lines with a BufferedReader using an InputStreamReader, handling exceptions.

Acquire hands-on skills to download html via a readable byte channel and a 64-byte buffer, reading from a url connection and printing each line.

Explain how network topology describes the shape of connections among computers, outline several types with advantages and disadvantages, and define packets as messages with destination addresses and data.

Ring topology forwards packets around a circle, with devices checking each packet for its destination, and is used in factory automation. A single fault can disrupt the entire network.

Explore star topology in local area networks, comparing hubs and switches, including hub broadcasts to all ports and switch forwarding to only the destination port.

Explore mesh topology, where nodes have multiple connections and routers create multiple paths; if a link fails, traffic is rerouted via alternative paths, common in metropolitan or wide-area networks.

Explore expanding star topology by combining buses and stars, using a backbone to connect switches, and applying DC chaining to scale networks across buildings.

Explore bus topology, a line topology where nodes tap a single coaxial cable to listen to packets with end terminators; ideal for small networks but not for large deployments.

Learn how the internet uses packet switching, where IP packets travel by routes, and how TCP coordinates delivery with sequence numbers, checksums, and retransmission within the TCP/IP model.

Examine tcp versus udp: udp provides no delivery guarantees or ordering, trading reliability for speed, ideal for streaming audio and video when low latency matters.

Explore how ports and sockets enable client-server communication, using circuits and port numbers, including well-known services. Review IP addresses, IPv4 and IPv6, and Java’s role in internet programming.

In Java network programming, explore the network interface class to enumerate and print network adapters, including IP addresses, IPv4/IPv6, and physical and virtual interfaces.

Explore how URI and URL identify internet resources by name and location, how HTTP and FTP protocols govern retrieval, and how magnet links relate to access.

Explore how URLs are parsed in Java by examining components like protocol, query, and user info, and practice calling methods to fetch web data from a site such as Wikipedia.

Explore how IP addresses identify devices and enable networking, covering IPv4 and IPv6, address scopes (link-local, private, global), and using java.net.InetAddress to resolve host names and inspect addresses.

Explore the basics of networks and protocols, including addressing and connection setup. See how IP underpins modern networks as a combination of two protocols and how encoding enables transmission.

Explore how tcp/ip and the internet protocol suite enable four-layer network communication, from link and internet layers to transport and application protocols like http, smtp, dns, imap, and pop3.

Explore data encapsulation across TCP/IP layers, where each layer adds headers and addresses to payload, forming protocol data units, segments, and frames with source and destination IP and MAC addresses.

Demonstrates how IP data is encapsulated into frames, uses ARP to resolve MAC addresses, and travels through a switch to deliver an IPv4 packet to the destination.

Understand how IP packets travel across multiple networks by routing through routers, using routing tables and MAC address lookups to forward Ethernet frames to a default gateway.

Explore five steps to build server-client apps with tcp/ip sockets. Create a server socket, accept a connection, set up input and output streams, exchange data, and close the connection.

Create a server that accepts and counts client messages, echoes numbered messages, confirms the count when the closing string arrives, and uses an alternating send-receive protocol started by the client.

Develop the client side of a TCP application in Java by creating a socket, connecting to host 127.0.0.1 on port 1234, and exchanging messages with the server.

Run and test a Java client–server application by initializing a socket, starting the server on port 1234, and exchanging messages with the client over localhost, illustrating Java networking concepts.