Networking Chapter 8 Flashcards
Circuit switching can be divided into ________ categories.
no
It’s a thing, just… it runs solo, or whatever.
Packet switching can be divided into ________ categories.
two
Datagram and Virtual Circuit
Circuit switching is normally used in ___________ layer.
physical
Packet switching is normally used in ___________ layers.
data-link and network
Message switching is normally used in ___________ layer.
application
In a circuit-switching network, we have ___________ phase(s).
three
In a datagram network, we have ___________ phase(s).
one
Data transmission; it doesn’t allocate resources so there’s no need for teardown, and it doesn’t keep information about the connection state (thus making it “connectionless”), so there’s no need for setup either.
In a virtual-switch network, we have ___________ phase(s).
three
In a ___________ network, each packet is treated independently from all other packets.
datagram
In a datagram network, the routing table is based on the ___________ in the packet.
destination address
It’s used against the routing table to find where it should travel next.
In a virtual-circuit network, the routing table is based on the ___________ in the packet.
Virtual Circuit Identifier
This is a local address, having only switch scope; it only is recognizable by the switches that border the switch that assigned it to the packet.
In a datagram network, the destination address ________________________.
stays the same at each switch. It’s used to consult against the routing table to find the next best route.
In a datagram network, we need ______________ phase(s).
no/one
The quiz has this wrong; the datagram network doesn’t use a setup or teardown phase at all.
In a virtual-circuit network, we need ______________ phase(s).
three
Set-up, data transfer, and tear-down
In a __________network, all packets in a message follow the same path.
virtual-circuit
Think about it; each packet that goes into a switch is going to have the same VCI and port as its peers. This will be looked at, with consideration from the lookup table, and will send it down the appropriate path. There’s no way a message’s packets could move in a different way from one another with this system.
