Quiz 1 Flashcards
Osi( open systems interconnection) Model
Applications
Presentation
Session
Transport
Network
Data link
Physical
** Please Do Not Throw Sausage Pizza Away***
Physical layer
Physical structure: Coax, Fiber, Wireless, Hubs,
- media, signal, binary transmission
Data link layer
- Data Link: Frames, PPP, Switch, Bridge
How devices communicate - physical addressing
Mac
LLC
Network layer
Network: Packets; IP, ICMP, IPSec, IGMP
Path determination and logical addressing
(IP)
Transport layer
Transport: End-to-End connections; TCP, UDP
Interhost communication and reliability
Session layer
Session: Synch & send to port; API’s, Sockets, WinSockets
- interhost communication
Presentation layer
Presentation: Syntax layer; SSL, SSH, IMAP, FTP, MPEG, JPEG
-Data representation and encryption
Application layer
Application: End User Layer; HTTP, FTP, IRC, SSH, DNS
- network process to application
Hubs/ repeaters
Regenerates signals over long distances
IP model ( internet protocol)
Application
Transport
Internet
Link
Link layer
LLC and MAC sublayer functions,
Address Resolution Protocol (ARP), Neighbor Discovery Protocol (NDP), IEEE 802.3 and IEEE
- communication over Ethernet
Internet layer
Traffic routing, traffic control, fragmentation, and logical addressing. Common protocols include IP, ICMP and IGMP
- packets too big, into smaller fragments
Transport layer
•acknowledgement, traffic control, session multiplexing, error detection and correction (resends), and message reordering.
-Common protocols include the Transport Control Protocol (TCP) and
TCP- transport control protocol
Resends packets and checks what info is needed
Udp- user datagram protocol
Sends packets but no checks. Faster .
Application layer
Common protocols include Named Pipes, NetBIOS,
MIME, TLS, SSL, FTP, DNS, HTTP, SMTP and many others
Who are the organizations that shape networking?
- ARIN: American Registry of Internet Numbers.
- IANA: Internet Assigned Number Authority
- ICANN: Internet Corporation For Assigned Names and Numbers 4. IEEE: Institute of Electrical and Electronic Engineers
- InterNIC: Internet Domain Name Registration Services
What’s Organizations over sees the following organizations for IP address allocation for IPv4 and IPv6 as well Autonomous Numbers: Reverse DNS, is also managed by this organization.?
• AFINIC, serving Africa
• APNIC, serving the Asia Pacific.
• ARIN, serving Canada, the United States, and many Caribbean and North Atlantic islands.
• LACNIC, serving Latin America and the Caribbean.
• RIPE NNC, serving Europe, the Middle East and parts of Central Asia.
• InterNIC: Internet Domain Name Registration Services
This organization over see all of domain registrants world wide.
• Institute of Electrical and Electronics Engineers
WIRELESS LOCAL AREA NETWORKS
• 802 LAN/MAN architecture, internetworking among 802 LANs, MANs and
other wide area networks, 802 Security, 802 overall network management, and protocol layers above the MAC & LLC layers.
-Govern how things communicate over local area network, Ethernet components, 802.11 wireless communication
IETF Internet Standards
• Here you can lookup TCP, UDP DNS, SMTP, TELNET, SSH, HTTP, TLS, SSL, OSPF, BGP to review the standard
Network media types
-Wired media: IEEE 802.2 & 802.3 standards •
-Optical media: Optical Transport Networks
• Wireless media: 802.11
wired network media standard.
• IEEE 802.2 and 802.3 define the wired network media standard.
IEEE 802.2
IEEE 802.2 defines the Logical Link Control (LLC). An example of a network bridge from Ethernet to wireless.
Ethernet media is bridged via 802.2 to 802.11 wireless media.
IEEE 802.3
802.2 LLC
• Basically, think of the 802.2 as the “translator” for the Data Link Layer. 802.2 i—concerned with managing traffic over the physical network.
-It is responsible for flow and error control.
The Data Link Layer wants to send some data over the network, 802.2 Logical Link Control helps make this possible. It also helps by identifying the line protocol, like NetBIOS, or Netware.
• IEEE 802.3
the wired network media standard.