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 |
