University Computer Network exercise

College Computer Network Exercise 1. Commonly Used topologies in Lan are star, ring, and bus. 2. In the current network system, the network coverage area, technical conditions, and working environment are different, which are generally divided into Wan, lan, and man. 3. Common communication media include wired and wireless media. 4. network servers include file servers, application system servers, and print servers. Among them, file servers are the most basic. 5. The communication methods between programs running in the end system on the network edge include P2P mode and Client/Server mode. 6. At present, lan transmission media mainly include twisted pair wires, coaxial cables and optical fiber cables. 7. The full name of the OSI model refers to the Development of System Interconnection Reference Models. the hierarchical structure of the model is physical layer, data link layer, network layer, transport layer, Session Layer, presentation layer, and application layer. 8. The basic operation process of a vswitch is caching, learning, registering, forwarding, and filtering. 9. The LAN bandwidth is usually expressed in B/s, which indicates the number of binary bytes transmitted per second. 10. The TCP/IP model adopts a layered structure that consists of four layers: network interface layer, network layer, transport layer, and application layer. 11. If a workstation does not have a hard disk or a soft drive, but only a processor, this kind of workstation can only work after the network connection. This kind of workstation without any memory is called a diskless workstation. 12. When connecting a computer to a hub or vswitch, use the ___________ cross line when connecting the host to the LAN interface of the router. (Enter the connection type of twisted pair wires) 13. The IP address structure consists of two parts: _ network number _____ and ___ host number ____. 14. The protocol used to resolve an IP address to a MAC address is _ ARP __. 15. The IP address used for local broadcast (broadcast to all hosts on the local network) is _ 255.255.255.255.255 ______. 16. The raw data is "010111111001", and the value is _ 0101111101001 _ after "Zero bit filling _. 17. 100 in 100Base-TX indicates 100 Mb/s, Base indicates ____ baseband transmission _______, and TX indicates ___ twisted pair ___. 18. Generally, two TCP connections are required between the FTP client and the server, namely _ control connection ___ and _____ data connection _____. 19. Two important functions of the network layer are _ routing selection ___ and _ grouping forwarding __. 20. In a computer network, use the _ cross ___ line for the same device connection, and use the _ straight _ line for different device connections. 21. For IP address 1100000010101000 00100000 000000010, the dot-decimal notation is ____ 192.168.32.2 __________. 22. Internet was developed from _ ARPANET ____ of the US military advanced research planning agency in 1969. 23. The basic purpose of building a computer network is _ Resource Sharing ____ and ___ Information Transmission ______. 24. Run the _ ipconfig/all ____ command to display the physical address of the NIC, the IP address of the host, the subnet mask, and the default gateway. 25. In a computer network, servers are the basic devices that provide shared resources for the network. 26. optical fiber is the most anti-interference transmission medium in computer networks. 27. To standardize the network system structure, the International Organization for Standardization (ISO) provides the OSI/RM (Open System Interconnection Reference Model. 28. In a computer network, rules or agreements that must be observed by both parties are called agreements. 29. The Chinese name of the URL is the uniform resource positioning. The URL format is <protocol >://< host >:< port >/< path>. 30. TCP is called the _ Transport Controller _ protocol, and IP is called the Internet connection protocol. 31. On the internet, the IP address or domain name can uniquely identify a host. 32. On the Internet, people translate WWW into the World Wide Web Based on transliteration. 33. In the Internet, "FTP" indicates the file transfer protocol. 34. The Chinese name of the Hub is the Hub. 35. The most basic communication protocol on the Internet is TCP/IP. 36. From the communication point of view, the connection-oriented service process includes three stages: establishing a connection, data transmission, and releasing a connection. 37. The basic technical parameters describing data communication are data transmission rate and error rate _. 38. Each host on the Internet must have at least one IP address, which must be unique throughout the network. 39. TCP can provide reliable, connection-oriented, and full-duplex data stream transmission services. 40. A vro can contain a special route. If no route is found to arrive at a specific network or a specific host, the route it uses when forwarding data packets is called _ default route. 41. On the internet, the remote logon system adopts the C/S _ mode. 42. Lan functions include two parts. corresponding to the data link layer of the OSI reference model and the _ physical layer _ FUNCTION 43. The device that implements network interconnection at the network layer is a router. 44. The WWW Client Program (browser) of the WWW application communicates with the Web server over HTTP. 45. The computer network system consists of a Communication Subnet and a resource subnet. 46. On the transmission layer of the TCP/IP Reference Model, UDP implements unreliable and connectionless datagram services, TCP is used to provide reliable end-to-end byte stream service for applications on an unreliable Internet. 47. A computer network that can cover a country or region or a continent is called a wan, A computer network in the same building or within several kilometers is called a LAN, and a man between the two is called a man. 48. The LAN protocol divides OSI as the data link layer into a media access control sub-layer and a logical link control sub-layer. 49. You can use the SMTP protocol to send mails over the Internet, and the POP3 protocol to receive mails. 50. In the 220.100.50.0 IP network with a subnet mask of 255.255.255.255.255.248, a maximum of _ 2 ^ 5 = 32 subnets can be divided, each subnet can be connected to a maximum of 2 ^ 3-2 = 6 hosts. 51. Switching networks can be divided into circuit switching, packet switching, and group switching. 52. In a TCP/IP network, the TCP protocol works on the transport layer and the FTP protocol works on the application layer. 53. The physical address of the NIC is _ 6 _ bytes, And the IEEE Registration Authority (RA) _ allocates the first three bytes. 54. to convert a host name to an IP address, use the _ DNS _ protocol to convert an IP address to a MAC address, and use the ARP _ protocol. 55. The Ping command uses the Echo request of _ ICMP and the Echo response packet. 56. In TCP/IP networks, physical addresses are related to the data link layer, logical IP addresses are related to the network layer, and port addresses are related to the transport layer. 57. The most representative internal gateway protocols include _ OSPF _ of The Link Status routing algorithm and _ RIP _ of the Distance Vector routing algorithm _. 58. Computer Networks have seven common performance indicators: speed, bandwidth, throughput, latency, latency bandwidth product, round-trip time, and utilization. 59. The network 122.21.136.0/24 and 122.21.143.0/24 are routed together and the obtained network address is 122.21.136.0/21. (First 21-bit matching) 60. Because the maximum transmission unit (MTU) of various networks is different, data packets must be divided and grouped when connected by routers.