Chapter 1
This layer of the internet is responsible for moving bits live on a wire.
What is the Physical Layer
This email protocol is responsible for pushing emails from a mail client to a mail server.
What is SMTP
This return message is used by the receiver to let the sender know the message was sent successfully.
What is an ACK
Daily Double:
Find the even parity bit of the following payload value:
0010 1111
What is static routing?
Static routing class of routing algorithms where paths change very slowly over time
This type of delay takes into account the physical travel time of bits being transmitted.
What is Propagation Delay
Which level of DNS Hierarchy is responsible for assigning domains? (.com, .edu, .gov, ect.)
Root DNS Servers.
This tool is used to ensure that the information in a packet has not changed while it was being transmitted.
What is Checksum
Match the address 10101101 with one of the following prefix:
11
100
101
C
What is the difference between interdomain routing and intradomain routing?
Inter is routing among different Autonomous systems while intra AS routing within the same Autonomous system
The average traffic over a particular link expressed as a percentage of total link capacity.
What is Link Utilization
This type of network does not require a main server to connect all of its users.
What is a Peer to Peer network (P2P)
This field in a UDP’s header is required because the payload can be of variable size.
What is the length field
Which plane (network-layer control or network-layer data) is responsible for computing the contents of the forwarding table
Network-layer control plane
This type of routing has all routers knowing complete topological and link cost information.
What is centralized global routing
This phenomenon occurs when one link has a lower transmission capacity than all other links in a given path.
What is Bottlenecking
What is the IMAP email protocol responsible for?
IMAP is responsible for pulling emails from a mail server
This practice involves taking data from a socket and encapsulating a data chunk with header information.
What is transport layer multiplexing
What is FCFS scheduling
First come first serve scheduling will handle packets in the order that they arrive
Which protocol carries ICMP messages?
ICMP runs directly on top of IP
This formula is used for finding traffic intensity.
Traffic Intensity (I) = L * a / R
or
Bits * Packets per Second / Transmission Rate
These two protocols are responsible for end to end delivery of messages to the application layer.
What is UDP and TCP
Suppose a packet is 10K bits long, the channel transmission rate connecting a sender and receiver is 10 mbps, and the round-trip propagation delay is 10 ms. What is the maximum channel utilization of a stop-and-wait protocol for this channel?
The maximum channel utilization is 0.1 or 10%
True or False:
A DHCP request message is broadcast, using the 255.255.255.255 IP destination address
True
What is the name of the problem that can occur in vector routing when link cost increases?
Counting to Infinity problem