(r3) DonaldsTopicLevelLearningGoals < Main

-- DonaldActon - 23 Mar 2011

The two parts of networking
- the way/technology that actually exchanges data
- the rules/semantics (protocol) for the data exchange
Explain what the network fallacies are/mean:
- (network reliability, latency is zero, infinite bandwidth ...)
Organization of the end systems + routers + communications links
Organization role of protocols, network of networks, standards
Network of networks
- layering, tiering
Protocol properties, reliable delivery, ordering, best effort
Network construction, ADSL, wireless, etc
Properties of networks, delay, bandwidth, errors, throughput
Difference in how data moves between circuit switching and packet switching
Sharing of bandwidth, TDM, FDM
Case for packet switching
What contributes to delay, including queuing delay
Interpreting traceroute with respect to delay meanings
idea and purpose of protocol layering
basic network security/vulnerability issues (trojans, man in the middle etc)
Application level protocol examples & how information is exchanged
- web/http as a bi-directional connected streams, client server model
- ftp - difference between a control channel and out of band data channel
- mail protocols - fact that there is no guarantee of who is sending mail
- DNS - large distributed application - not based on connections - how it works
- P2P example (bittorrent - edonkey, DHT)
Addressing - role of IP address and port
Transport layer properties, timing, throughput, loss
Performance HTTP as an example of ways to make things go faster
multiplexing and demultiplexing and how it is achieved TCP and UDP
creating a reliable data stream from an unreliable one
- dealing with lost/corrupt data
- maintaining order, if needed
- timeouts, ACKS, NACKS, etc
Performance - sliding windows, selective ACK, go back N, sequence numbers
Event response diagrams for reliable protocol
TCP packet header/format
TCP sequence numbering, acks, and retransmission scenarios
- fast retransmit
Estimating round trip time and using it to set timeout values
TCP flow control
TCP connection setup
TCP connection termination
Congestion, how why it occurs
Performance issues of congestion
TCP congestion detection and handling
TCP probing for bandwidth
- slow start
- loss events
- timeouts
TCP connections and sharing of BW
Congestion in a circuit switched scenario
Role of network layer
information in IP header used to perform network layer functions
- protocol type
- length
ICMP - what is is used for (especially in traceroute)
IPv6 and how it differs from IPv4
Strategy to transition from IPv4 to 6
how packets are routed in a virtual circuit switched network
- role of virtual circuit ID
longest prefix matching and forwarding tables
router architectures, compare and contrast
IP addresses, subnetting, and CIDR
DHCP - what it does, why it is useful
IP address assignment from ICANN
How NAT works - issues and problems
Why NAT is used
Routing and mapping to graphs
Dijkstra's routing algorithm and how it is implemented
Dijkstra's algorithm and oscillations
Bellman-Ford distance vector and how it is implemented
Bellman-Ford - count to infinity issue
Hierarchical routing
Autonomous systems
Intra AS routing and protocols
Inter AS routing and protocols
RIP and OSPF
BGP
BGP route selection and how policies are achieved
link layer - Ethernet frame and
possible link layer services (flow, error detection/correction half/full duplex)
role of parity, checksums CRC
Channel access protocols * TDMA * FDMA * random access protocols * ALOHA, Slotted ALOHA, CSMA, CSMA/CD * taking turns (token passing, polling
Ethernet header
ARP's role and functioning
All the steps, protocols used etc when a packet is sent/routed from one node to another
Hardware * hubs * switches * routers * how they all fit together * time to live * fragmentation
routes and forwarding in routers

Topic revision: r3 - 2011-03-24 - DonaldActon

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