06) Network
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30 Terms
What is packet switching?
Sharing network resources among many users
What is circuit switching?
Dedicated resources for each session
What is advantage of circuit switching?
Guaranteed performance
What is disadvantage of circuit switching?
Resources may be unused
What is advantage of packet switching?
Efficient and scalable resource use
What is statistical multiplexing?
Multiple sessions share one path
What is resource pooling?
One session can use multiple paths
What was ARPANET?
First packet-switched network
Who developed TCP/IP?
Robert Kahn and Vinton Cerf
What is TCP/IP?
Protocol suite for communication
What is the Internet?
Network of interconnected networks
What are ISPs?
Organizations providing Internet access
What is Internet hierarchy?
Tier 1 Tier 2 Tier 3 ISPs
What is Tier 1 ISP?
Backbone with global reach
What is Tier 2 ISP?
Connects to Tier 1 and customers
What is Tier 3 ISP?
Local networks serving users
What does a router do?
Forwards packets to destination
What is routing?
Choosing path for packets
What is forwarding?
Sending packet to next hop
What is hop-by-hop?
Packet moves one router at a time
What is IP address?
Unique identifier for device
What is IPv4 size?
32 bits
What is IPv6 size?
128 bits
What is prefix?
Identifies subnet
What is host ID?
Identifies device in subnet
What is DHCP?
Assigns IP addresses dynamically
What is NAT?
Translates private and public IPs
What is intra-AS routing?
Routing within one network
What is inter-AS routing?
Routing between networks
What is shortest path?
Minimum cost route