overall
- The whole part of Jiwang is still based on Teacher Quanlong’s PPT and Wangdao’s postgraduate entrance examination questions and after-school questions.
- The parts of the test are very detailed and are all content on the PPT. It is best not to just be kingly. You should also read the very detailed points on the PPT.
- The amount of questions is very large, 25 choices, 5 judgments, 10 fill-in-the-blanks, and 5 big questions. If you are not proficient, you may not be able to finish it.
- All the pictures are from resources found online, such as 19-22 school questions and 408 real questions. They are not owned by me.
- The website is a teacher of Lake University of Science and Technology
Question recall
Multiple choice questions
I can only recall part of it, my memory is not very good.
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Which layer does the transport layer provide services for in the OSI and TCP/IP models?
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I’ll give you a picture and ask how many conflict domains and broadcast domains there are. It seems that two routers were given. I don’t remember this. Anyway, it’s most likely a royal question.
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In the iterative query mode, the last server queried by the host is.
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The protocols that Xiao Ming cannot use when accessing Inerernet are A.PPP B.SMTP C.UDP D.ARP
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The protocol for transferring files between mail servers is SMTP
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HTTP 1.1 The shortest time for non-pipeline transmission of a reference to ten image files (the answer is really no 12) A.10rtt B 11rtt C 20 D 22
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There are three packets, all 1500B, passing through a router. The shortest queuing delay is A12us B24 C36 D 48
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Given a network layer message with a length of more than 4000, and the MTU is 1500BDF = 1Ask A, discard B and divide it into several pieces.
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Three elements of an agreement. Give four and ask which three are
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Ask about TCP sending window
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Probability of resending.
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What does not conflict is ALOHA CSMA TDMA CSMA/CA
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IPV4 and IPV6 are from the 2023 408 postgraduate entrance examination questions
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The channel utilization rate of SR protocol is calculated as the acknowledgment frame length.
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Give a bunch of binary numbers and ask what number they want to express when translated into CDMA.
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Physical layer The encoding sent by the source can be
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ASK FSK PSK Which frequency band has the lowest utilization rate?
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What are the parts of UDP that verify IP? I remember that I chose a protocol and the three were not given.
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CSMA/CA
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The CSMA/CA method adopts the reservation method. The shortest time to send data is D + several F
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Mobile IP
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NAT conversion and subnet division (source from 2023 postgraduate entrance exam questions)
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2011 408 Jiwang real questions
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The component responsible for the forwarding part of the router is
The two options that impressed me most are the routing table and the switching structure. Everyone is entangled in these two options. -
CRC check code
True or False
Personally, I think it is very simple. For example, P2P is better than CS block. ICMP must send all errors, etc.
Fill in the blanks
- Change the next selection to two empty spaces.
- Similar to this, how many bit errors do you want to correct and how many bit errors do you want to detect? What is the minimum Hamming distance required
Forgot the rest
big topic
The first big question Routing table - the first three questions are basically the same as the ones below
2. Give the specific diagram according to OSPF's Dickens The process of calculating the shortest path by Tella algorithm
3.RIP UDP OSPF IP
4.Internet Protocol BGP is encapsulated with TCP.
The second biggest question Copied from the 2023 408 real question
It is basically the same, except that the numbers have been changed a bit, and the last question has three handshakes and four waves.
The third major question Subnet division
The first question is to divide the subnet. It seems to let 123 share a large subnet and then divide it internally. Then the number of 2 addresses is greater than 120
The second question is to write R1 about the Internet. The routing entry 0.0.0.0
The third question is the switch table after address resolution
The fourth question is a DHCP and then a default gateway. I remember 2 Ask what the IP address of one end of the router is?
The fourth major question Ethernet MAC CSMA/CD
Calculate the distance between MTU and the shortest frame length. The second question is an exponential backoff algorithm. The third question is what the hidden device is. It cannot isolate the broadcast domain but can isolate the collision domain.