I think, at the beginner programming stage, anything that makes the code more robust parts are barriers to a beginner. Only only a skeleton code in order to understand the programming steps and structure.
Learning computer networks, TCP / IP network programming, it is recommended to learn "TCP / IP network programming", they talk about the skeleton, it is very suitable for beginners to learn, to explain clearly to network programming straightforward, entirely suitable for beginners, to write the network programming of each step, and the code does not add too much exception handling, and other parts to make the code more robust.
Hands-on learning:
"TCP / IP network programming" PDF, 421 pages, with a table of contents, text can be copied. Complete source code. Yin Yu San with, Jin Guozhe translation.
Download: https://pan.baidu.com/s/1yoSvmutGqCMOy-bXMn4h7Q
extraction code: 91vu
"TCP / IP network programming" a total of three sections, 25 chapters content.
The first part introduces the basics of network programming. This section focuses on the essential basics of programming for Windows and Linux networks, not too much involved different operating
system characteristics.
The second and third parts of the operating system. The second part is Linux-related content, while the third part is the Windows-related content. After browsing in Windows programming friends the second part, the same can improve skills.
The fourth part of the contents of the book are summarized, including the recommendations of the study on the basis of experience itself summarized.
It is not limited to simple endorsement of network programming, and in the final recommendation advanced learning once again stressed the importance of system programming. Both the Linux and Windows platforms, spoke select, epoll, and multicast content, and the option to set the socket part to explain. Code clear, readable, know some basic concepts, by manually implement a general understanding of the whole picture of network programming.
For computer networks, TCP / IP Quick Start hope, for those who already know and want a quick refresher prepare for the interview, it is recommended to learn "a book to read TCP / IP" and "graphic TCP / IP 5th Edition."
《一本书读懂TCP/IP》PDF，461页，带目录，文字可复制。
《图解TCP/IP第5版》PDF，328页，带书签，文字可复制。
下载: https://pan.baidu.com/s/1IAczAe2n2Dibf3qzbMZIDg
提取码: winn
《一本书读懂TCP/IP》介绍互联网核心协议TCP/IP知识，内容不仅包括TCP/IP的起源、组成、规则、应用、路由协议、常用命令、主流技术，还涵盖物联网、云计算、大数据等热点技术。采用大量漫画，图文并茂，语言风趣，结合现实，将复杂的原理、技术通俗化，行文风格活泼，易于理解和接受。共十章内容。
《图解TCP/IP第5版》是一本图文并茂的网络管理技术书籍，旨在理解TCP/IP的基本知识、掌握TCP/IP的基本技能。讲解了网络基础知识、TCP/IP基础知识、数据链路、IP协议、IP协议相关技术、TCP与UDP、路由协议、应用协议、网络安全等内容，引导了解和掌握TCP/IP，营造一个安全的、使用放心的网络环境。适合计算机网络的开发、管理人员阅读，也可作为大专院校相关专业的教学参考。
图解非常直观，文字讲解也是简单易懂，翻译得非常流畅。
图示做得都很直观、漂亮，以发邮件来解释OSI参考模型，术语保留英文名称，物理层的作用就是把上层的0、1比特信号转换成诸如电压的高低、灯光的亮灭等物理信号，然后传递出去。