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Class Notes for CSE 123 at University of California - San Diego (UCSD)

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UCSDCSE 123Alex SnoerenFall

CSE 123 Lecture Notes - Lecture 27: Source Routing, Hypertext Transfer Protocol, Tcp Tuning

OC9487305 Page
7 Dec 2018
0
| ethernet | ip | tcp | http | payload. Know the fields of each header, how to fragment, etc. Arbitrate which nodes can send frames at any point in tim
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UCSDCSE 123Alex SnoerenFall

CSE 123 Lecture Notes - Lecture 23: Intersymbol Interference, Bandlimiting, Baud

OC9487303 Page
26 Nov 2018
0
For any bandlimited channel, it has a max freq f. Reality: you cannot change that freq very fast! (depends on how high it is!) Attempting to signal too
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UCSDCSE 123Alex SnoerenFall

CSE 123 Lecture Notes - Lecture 22: Demodulation, Background Noise, Error Detection And Correction

OC9487303 Page
21 Nov 2018
0
Modem (modulator demodulator): communicating with computers over old phone lines! Take input stream of bits (digital data) Modulate some physical media
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UCSDCSE 123Alex SnoerenFall

CSE 123 Lecture Notes - Lecture 20: Network Congestion, Minimax, Lincoln Near-Earth Asteroid Research

OC9487304 Page
17 Nov 2018
0
Should not be faster than the sender"s share . Should not be faster than the network can process . Cc & bandwidth allocation are separate ideas, but fr
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UCSDCSE 123Alex SnoerenFall

CSE 123 Lecture Notes - Lecture 15: Routing Information Protocol, Routing Protocol, Enhanced Interior Gateway Routing Protocol

OC9487303 Page
2 Nov 2018
0
Note: these do not work all the time. Never advertise a destination through its next hop. Tell some neighbors one thing, tell others another. Poison re
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UCSDCSE 123Alex SnoerenFall

CSE 123 Lecture Notes - Lecture 11: Address Space, Ipv6 Address, Network Address Translation

OC9487303 Page
22 Oct 2018
0
Class c too small for most orgs! Does not create any more addresses! (still 32-bit addresses) No longer constrained to class a-c addresses! Networks de
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UCSDCSE 123Alex SnoerenFall

CSE 123 Lecture Notes - Lecture 9: Ipv4, Packet Loss, Checksum

OC9487302 Page
17 Oct 2018
0
Own addressing scheme (for routers to forward packets) E. g: fddi"s max packet is 4500 bytes while ethernet is 1500 bytes! Something might go wrong in
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UCSDCSE 123Alex SnoerenFall

CSE 123 Lecture 8: L8 10/15/18

OC9487303 Page
15 Oct 2018
0
All nodes think they"re the root initially . Every bridge has a # when they"re manufactured (globally unique!) Each bridge sends periodic configuration
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UCSDCSE 123Alex SnoerenFall

CSE 123 Lecture Notes - Lecture 1: Sliding Window Protocol, Link Layer, Master Sergeant

OC9487302 Page
3 Oct 2018
0
P1 due 6pm oct, 29th (right before midterm!) End-to-end argument - functionality should be implemented at a lower layer iff it can be correctly and com
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UCSDCSE 123Alex SnoerenFall

CSE 123 Lecture Notes - Lecture 17: Nynex, Uunet, Border Gateway Protocol

OC9487304 Page
10 Nov 2018
0
How much 16669$ (and how to pay) Some as that"s got more connectivity (more friends) than you do. Most of us are just customers (dorm, apt, small org)
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UCSDCSE 123Alex SnoerenFall

CSE 123 Lecture Notes - Lecture 10: Internet Control Message Protocol, Future Proof, Loopback

OC9487303 Page
19 Oct 2018
0
But the router will keep dropping this packet! Router detects a problem with the packet! If the router drops the packet, the sender will resend it! Nee
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UCSDCSE 123Alex SnoerenFall

CSE 123 Lecture Notes - Lecture 7: Local Area Network, Collision Domain, Collision Detection

OC9487303 Page
13 Oct 2018
0
One shared link (bus) limits scale in terms of. We don"t have to share air spaces in time. Better alternative is to have multiple busses. Need ability
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