计算机网络 - 总结
到这儿基本郑老师课上的内容就都结束了,后面一些网络安全技术的延申个人觉得对计算机网络而言不甚重要,所以没有学习笔记,另外第八版中有关MPLS、wireless网络的一些内容,比如VPN、CSMA/CA等技术和协议,虽然对本科生不作要求,但是研究生是需要学习的,但像CSMA/CA协议,郑老师在前面的内容中已经讲过,还有数据中心、QoS等等,都在之前的课程中有所涉及,可见郑老师课堂内容之丰富,所以虽然第八版单独成章,所以没有专门写笔记,时间确实来不太及,这第六章的内容,还是考完试回来补的XD。
这学期的计网考试,从客观的角度上来说确实不是很难,没有考察超过PPT和平时讲座的任何内容,基本每一题都有些印象,但是做选择题还是有一些题目不太确定,想要去翻找相关的知识点,却又难以精准定位,浪费了很多时间(我还把老师总计超过一千张的PPT浓缩到了300+,都来不及找,浓缩的过程中甚至浓缩掉了一个考点,数公里到数十公里覆盖范围的网络,应该是MAN,我有印象但是在记不清楚,选的WAN,WAN的范围是几百到几千公里,悲)。
翻资料耗时太多,导致最后有一道简答题写得很简答,题目要求总结一下RDT并讲一下用途,我只来得及简单地说了一下RDT期望保障可靠性,发端请求和收端返回ACK的过程,画了张C/S的草图想节省时间,也只来得及标注了收端返回n+1作期望代替NCK的做法,用途只来得及写了两种pipeline的形式,GBN和SR,没足够时间做出补充,看上去实在太过简略。就作答情况而言,老师如果高抬贵手,应该是可以过的,能过就好了,复习、课设还有实验室忙得头掉,只能说我也是尽力而为best-effort了。
整理了缩写和全称的表格,其中有一条复制的PPT上的,没细看,PPT上是错的,复制了也是错的,考的时候有所怀疑,但是依然坚定了整理的知识点,结果发现当时的自己是对的,是整理的知识点错了,悲^2。错的是CDN,应该是Content Delivery Network,当时资料上是Content Provider Network,就离谱。
刚考完计网又要复习算法了,但是就这一门了吧,还有算法的课设,前一届集体摆烂大家都没做,最后不了了之,今年有几个人带头一卷,大家一块儿难受,害。
缩写-全称表格如下,为考场快速查找,按A-Z的顺序排序,现在应该没什么错的了,属实难顶。
| AF - assured forwarding | 
| AIMD - Additive Increase Multiplicative Decrease | 
| AON - Active Optical Network | 
| AP - access point | 
| API - Application Programming Interface | 
| ARIS - Aggregate Route-Based IP Switching | 
| ARP - Address Resolution Protocol | 
| ARPANET - Advanced Research Projects Agency Network | 
| ARQ - Automatic Repeat-reQuest | 
| AS - Autonomous System | 
| ASN - Autonomous System Number | 
| ATM - Asynchronous Transfer Mode异步传输模式 | 
| AToM - Any Transport over MPLS | 
| BDR - Backup Designated Router | 
| BE - best-effort | 
| BER - bit error rates | 
| BF - Bellman-Ford equation | 
| BGP - Border Gateway Protocol | 
| BSS - Basic Service Set | 
| C - Customer devices | 
| CA - Control Agency | 
| CC - Coaxial cable | 
| CDMA - Code Division Multiple Access | 
| CDN - Content Delivery Network | 
| CE - Customer Edge devices | 
| CI - congestion indication | 
| CIDR - Classless InterDomain Routing | 
| CLI - Command Line Interface | 
| CLNP - ConnectionLess Network Protocol | 
| CoS - Class of Service | 
| CRC - Cyclic redundancy checks | 
| CR-LDP - Constraint-based Routing LDP | 
| CSMA - carrier sense multiple access | 
| CSMA/CA - Carrier Sense Multiple Access with Collision Avoid | 
| CSMA/CD - CSMA with collision detection | 
| CSR - Cell Switching Router | 
| CTS - Clear To Send | 
| DASH - Dynamic, Adaptive Streaming over HTTP | 
| DBD - Database Description | 
| DCQCN - Congestion Point Notification Point Reaction Point | 
| DCTCP - Data Center TCP | 
| DHCP - Dynamic Host Configuration Protocol | 
| DNM - Domain Name Management | 
| DNS - Domain Name Server | 
| DoS - Denial of service | 
| DR - Default Routes | 
| DR - Designated Router | 
| DSCP - Differentiated Service Code Point | 
| DSL - digital subscriber line | 
| DSLAM - DSL Access Multiplexer | 
| DSP - Digital Signal Processing | 
| DV - Distance vector algorithm | 
| eBGP - external BGP | 
| ECN - Electronic Communication Network | 
| ECN - Explicit Congestion Notification | 
| EDC - Error Detection And Correction | 
| EF - expedited forwarding | 
| EGP - exterior gateway protocol | 
| EIGRP - Enhanced Interior Gateway Routing Protocol | 
| FCFS - FIRST COME FIRST SERVICE | 
| FDM - Frequency Division Multiplexing | 
| FEC - Forward Equivalence Class | 
| FIFO - first in first out | 
| FIN - FINAL | 
| FLSM - Fixed length subnet mask subnetting | 
| FOC - Fiber optic cable | 
| FSM - finite state machines | 
| FTP - File Transfer Protocol | 
| FTTH - Fiber To The Home | 
| GBN - Go-Back-N | 
| GPRS - General packet radio service | 
| GRE - Generic Routing Encapsulation | 
| GTP - GPRS Tunneling Protocol | 
| HFC - hybrid fiber coax | 
| HOL - Head-of-the-Line | 
| HQoS - Hierarchical Quality of Service | 
| HTML - HyperText Markup Language | 
| HTTP - Hyper Text Transfer Protocol | 
| H-VPLS - Hierarchical VPLS | 
| IAB - Internet Architecture Board | 
| IAM - Internet Architectural Management | 
| IANA - The Internet Assigned Numbers Authority | 
| iBGP - internal BGP | 
| ICANN - The Internet Corporation for Assigned Names and Numbers | 
| ICMP - Internet Control Message Protocol | 
| ID - Internet Draft | 
| IDC - Information Distribution Company | 
| IDP - Internet Datagram Protocol | 
| IESG - Internet Engineering Steering Group | 
| IETF - Internet Engineering Task Force | 
| IGD - Internet Gateway Device | 
| IGMP - Internet Group Management Protocol | 
| IGP - interior gateway protocol | 
| IMSI - International Mobile Subscriber Identity | 
| IP - Internet Protocol | 
| Ipsec - IP security | 
| IRSG - Internet Research Steering Group | 
| IRTF - Internet Research Task Force | 
| ISP - Internet Service Provider | 
| IXP - Internet Exchange Point | 
| L2F - The Layer Two Forwarding (Protocol) | 
| L2TPv3 - Layer Two Tunneling Protocol version 3 | 
| LAN - local area network | 
| LDP - Label Distribution Protocol | 
| LER - Label Edge Router | 
| LS - link state algorithm | 
| LSA - Link State Advertisements | 
| LSAck - Link Status Acknowledgement | 
| LSP - Label Switched path | 
| LSR - Label Switch Router | 
| LSR - Link Status Request | 
| LSU - Link Status Update | 
| LTE - Long-Term Evolution | 
| MAC - Media Access Control | 
| MIB - Management Information Base | 
| MISO - Multiple-input and single-output | 
| MPLS - Multiprotocol label switching | 
| MSS - Maximum Segment Size | 
| MSTP - Multi- Service Transport Platform | 
| MTU - Maximum Transmission Unit | 
| NAS - Network Access Servers | 
| NAT - Network Address Translation | 
| NCP - Network Control Protocol | 
| NFV - network functions virtualization | 
| NHLFE - Next Hop Label Forwarding Entry | 
| NHLFT - Next Hop Label Forwarding Table | 
| NI - no increase in rate | 
| NIC - Network Interface Card | 
| NSAP - network service access point | 
| ODL - OpenDaylight | 
| OFDMA - Orthogonal Frequency Division Multiple Access | 
| OLT - Optical Line Terminator | 
| ONT - Optical Network Terminator | 
| OSPF - Open Shortest Path First | 
| OTT - over the top | 
| P - Service Provider devices | 
| PDCP - Packet Data Convergence Protocol | 
| PE - Service Provider Edge devices | 
| PE-r - Provider Edge routers | 
| PE-rs - Provider Edge devices that are capable of both routing and switching | 
| PE-s - Provider Edge switches | 
| PHB - Per-Hop Behavior (PHB) | 
| PON - Passive Optical network | 
| PoP - Points of Presence | 
| ppm - pkts per min | 
| PPP - Point to Point Protocol | 
| PPTP - The Point-to-Point Tunneling Protocol | 
| Q-in-Q - IEEE 802.1Q tunneling | 
| QoS - Quality of Service | 
| QUIC - Quick UDP Internet Connection | 
| RARP - Reverse Address Resolution Protocol | 
| RDMA - remote Division Multiple Access | 
| RDT - Reliable data transfer protocol | 
| RED - Random Early Detection | 
| RFC - Request for Comments | 
| RIP - routing information protocol | 
| RLC - Radio Link Control | 
| ROM - Read-Only Memory | 
| RPC - Remote Procedure Call | 
| RR - Round Robin | 
| RST - RESET | 
| RSVP - Resource Reservation Protocol | 
| RSVP-TE - Resource ReSerVation Protocol-Traffic Engineering | 
| RTP - Real-time Transport Protocol | 
| RTS - Request To Send | 
| RTS - revised technical specification | 
| RTT - Round-Trip Time | 
| SDH - Synchronous Digital Hierarchy | 
| SDN - software-defined networking | 
| SGMP - Simple Gateway Monitoring Protocol | 
| SIM - Subscriber Identity Module | 
| SIMO - Single-input and multiple-output | 
| SLA - Service Level Agreement | 
| SLAs - Service Level Agreements | 
| SMI - Structure ofManagement Information | 
| SMTP - Simple Mail Transfer Protocol | 
| SNMP - Simple Network Management Protocol | 
| SNR - signal-to-noise ratio | 
| SONET - Synchronous Optical Network | 
| SPF - Shortest Path First | 
| SPOF - single point of failure | 
| SR - Selective repeat | 
| SSL - Secure Sockets Layer | 
| SYN - Synchronize Sequence Numbers | 
| TCAMs - ternary content addressable memories | 
| TCP - Transmission Control Protocol | 
| TDM - Time Division Multiplexing | 
| TOR - Top of Rack | 
| ToS - Terms of Service | 
| TOS - Type of Service | 
| TP - Twisted pair | 
| TTL - Time To Live | 
| UDP - User Datagram Protocol | 
| UPnP - Universal Plug and Play | 
| VLAN - Virtual Local Area Network | 
| VLSM - Variable Length Subnet Mask | 
| VoIP - Voice over Internet Protocol | 
| VPLS - Virtual Private LAN Service | 
| VPN - Virtual Private Networks | 
| WAN - Wide Area Network | 
| WDM - Wave Division Multiplexing | 
| WFQ - weight fair queuing | 
| WLAN - Wireless local area network | 
| WRED - Weighted Random Early Detection | 
