Which of the following best describes the information that one AS communicates to other AS's via the BGP protocol? It br
Posted: Sun May 15, 2022 1:19 pm
Which of the following best describes the information
that one AS communicates to other AS's via the BGP
protocol?
It broadcasts a set of policies that neighboring AS's must
follow when handling datagrams originating within its own AS.
It transmits a data structure that describes the network
topology of its AS so that neighboring AS's can use this data to
feed to their routing algorithms (e.g., Dijkstra).
It queries neighboring AS's to see if they can route to a
particular destination host once the gateway router receives a
datagram destined for that host.
It advertises a list of hosts to which it can route
datagrams.
In Software Defined Networking (SDN), how does the
remote controller learn about the state of the routing network
within its scope?
It doesn't... SDN uses distributed routing algorithms such as
Bellman-Ford.
It injects a significant volume of test datagrams between the
constituent routers to measure network latencies and
congestion.
It synthesizes the network congestions costs reported to it by
the individual routers to paint a complete picture.
It sniffs datagrams traveling through the network to extract
destination IP addresses and then pings those destinations to
report when they receive their payloads.
Within a single AS, what is meant by hot potato
routing?
A situation where a router or SDN controller with two gateway
options for a datagram leaving the AS will plan a route to the
nearest gateway with respect to costs within the AS and without
considering subsequent inter-AS costs.
The round robin pinging of routers within an AS to determine
which ones have gateway access.
A situation in which inefficiencies in routing causes a datagram
to enter a cycle and revisit routers that it already passed through
during the same trip.
Oscillations in optimal routing that are introduced when optimal
routes get saturated with traffic, causing them to become
sub-optimal in future routing calculations.
At the link layer, what is the purpose of a cyclic
redundancy check (CRC)?
To help deduplicate frames that are accidentally received twice
(e.g., due to no ACK, collision, or multi-path interference)
To be used as a hash value to associate an ACK response with a
successfully received frame.
To help determine whether there are any bit errors in a received
frame.
To help establish the authenticity of the data in a frame, which
helps thwart IP spoofing attacks.
In what scenario is TDMA (with 10 time slots per round)
a more efficient and fair protocol than ALOHA in a multi-access
communication channel?
Only when there is a single station transmitting
When there are 9 or 10 stations transmitting simultaneously.
When there are 2 or 3 stations transmitting simultaneously.
When there are significantly more than 10 stations transmitting
simultaneously.
that one AS communicates to other AS's via the BGP
protocol?
It broadcasts a set of policies that neighboring AS's must
follow when handling datagrams originating within its own AS.
It transmits a data structure that describes the network
topology of its AS so that neighboring AS's can use this data to
feed to their routing algorithms (e.g., Dijkstra).
It queries neighboring AS's to see if they can route to a
particular destination host once the gateway router receives a
datagram destined for that host.
It advertises a list of hosts to which it can route
datagrams.
In Software Defined Networking (SDN), how does the
remote controller learn about the state of the routing network
within its scope?
It doesn't... SDN uses distributed routing algorithms such as
Bellman-Ford.
It injects a significant volume of test datagrams between the
constituent routers to measure network latencies and
congestion.
It synthesizes the network congestions costs reported to it by
the individual routers to paint a complete picture.
It sniffs datagrams traveling through the network to extract
destination IP addresses and then pings those destinations to
report when they receive their payloads.
Within a single AS, what is meant by hot potato
routing?
A situation where a router or SDN controller with two gateway
options for a datagram leaving the AS will plan a route to the
nearest gateway with respect to costs within the AS and without
considering subsequent inter-AS costs.
The round robin pinging of routers within an AS to determine
which ones have gateway access.
A situation in which inefficiencies in routing causes a datagram
to enter a cycle and revisit routers that it already passed through
during the same trip.
Oscillations in optimal routing that are introduced when optimal
routes get saturated with traffic, causing them to become
sub-optimal in future routing calculations.
At the link layer, what is the purpose of a cyclic
redundancy check (CRC)?
To help deduplicate frames that are accidentally received twice
(e.g., due to no ACK, collision, or multi-path interference)
To be used as a hash value to associate an ACK response with a
successfully received frame.
To help determine whether there are any bit errors in a received
frame.
To help establish the authenticity of the data in a frame, which
helps thwart IP spoofing attacks.
In what scenario is TDMA (with 10 time slots per round)
a more efficient and fair protocol than ALOHA in a multi-access
communication channel?
Only when there is a single station transmitting
When there are 9 or 10 stations transmitting simultaneously.
When there are 2 or 3 stations transmitting simultaneously.
When there are significantly more than 10 stations transmitting
simultaneously.