Lecture 1

1. Internet abstractization        

1. The TCP/IP stack

1. Layer 1 (Network Access)
2. Layer 2 (Internet)
3. Layer 3 (Transport)
4. Layer 4 (Application)

2. The OSI stack (optional)

2. Layer 1 (Network Access)

1. Transmission medium

1. Copper cables (UTP): electrical

1. UTP cable categories 5, 5E, 6, 6A

2. Optical Fiber
3. Radio (Frequencies and channels)

3. Layer 7 (application)

 Socket programming

2. IP address
3. port
4. Client/Server model
5. UDP protocol (datagram based, connectionless oriented)

1. System calls: socket, bind, sendto, recvfrom
2. python and php examples
3. Servers with multiple clients

1. iterative
2. paralel(concurrent)

Lecture 2

1. Layer 7 (application)

TCP protocol (flow based, connection oriented)

1. System calls: socket, bind, listen, accept, connect, send, recv
2. Concurrent TCP servers

• processes
• threads

3. console web client in Python

2. Layer 1 (Network Access)

1. Network Topologies

• bus
• ring
• star

2. media access control address (MAC address)

1. 6 octets in hexadecimal (c8:5b:76:7b:d7:78)
2. unique ?

3. Layer 2 (Internet)

1. IP (Internet Protocol) address

• 32 bits separated in 4 octets represented in decimal

Example: 192.168.2.3

2. Subnet Mask (NM)

• 32 bits separated in 4 octets represented in decimal or as prefix.

Example: 255.255.255.0 is equivalent to /24 because it has 24 bits of 1

3. Network classes of addresses (must be powers of 2). Their size equals 2 at the power of the number of 0 in the netmask.
4. Network address is obtained by binary AND-ing an IP and it’s NM
5. Broadcast address is obtained by OR-ing the IP and NOT NM
6. examples

Lecture 3

1. Default Gateway
2. DNS server
3. Web server
4. Wireless router configuration

1. Internet zone (WAN)
2. Intranet zone (LAN)
3. wireless settings: SSID, Channel, Security

Lecture 4

1. Routing in packet networks

1. Static routing

1. routing table
2. destination network
3. next hop

2. Dynamic routing (RIPv2)

2. Connecting to a router using console cable
3. DHCP on router