CS6250 COMPUTER NETWORKS
EXAM 1 STUDY SET SUMMER 2024
How=did=Licklider=and=his=team=in=the=early=1960s=experiment=with=a=precursor=to=the
=Internet?=-=ans-✔✔Connecting=two=computers=over=a=dial=up=telephone=line
What=is=the=Domain=Name=System=(DNS)=designed=to=do=primarily?=-=ans-
✔✔Translate=domain=names=into=IP=addresses
What=is=the=architectural=design=of=the=Internet=protocol=stack=based=on?=-=ans-
✔✔Layers
Both=the=data=link=and=transports=layer=protocols=may=provide=error=correction=-=ans-
✔✔True
What=allows=for=communication=between=the=application=layer=and=the=transport=layer
?=-=ans-✔✔Sockets
Which=of=the=following=protocols=belong=to=the=application=layer?
Ethernet
IP=(Internet=Protocol)=
DNS=(Domain=Name=Service)
UDP=(User=Datagram=Protocol)=-=ans-✔✔DNS=(Domain=Name=Service)
Which=two=protocols=belong=to=the=transport=layer?=
UDP=
TCP=
HTTP=
, IP=-=ans-✔✔UDP=and=TCP
When=an=application=sends=a=packet=of=information=across=the=network,=this=packet=tr
avels=down=the=IP=stack=and=undergoes=what=process?=-=ans-✔✔Encapsulation
According=to=the=end-to-
end=principle,=where=should=most=of=the=Internet's=functionality/
intelligence=be=implemented?=-=ans-✔✔At=the=edges=of=a=network
What=is=the=difference=between=hubs,=bridges,=and=routers?=-=ans-
✔✔They=operate=on=different=layers=of=the=IP=stack
The=transport=layer=protocols=offer=a=logical=connection=between=processes=only=if=the
=hosts=reside=in=the=same=network=-=ans-✔✔False
A=sending=host=receives=a=message=from=the=application=layer=and=encapsulates=it=wi
th=the=transport=layer=header=before=passing=it=down=to=the=network=layer=-=ans-
✔✔True
An=application=running=on=a=host=can=bind=to=multiple=sockets=simultaneously=-=ans-
✔✔True
The=identifier=of=a=UDP=socket=is=a=tuple=of=destination=IP=address=and=port=-=ans-
✔✔True
The=identifier=of=a=TCP=socket=is=a=tuple=of=source=IP=address=and=port=-=ans-
✔✔False
UDP=is=considered=more=lightweight=than=TCP=-=ans-✔✔True
One=of=the=functionalities=that=UDP=offers=is=to=increase=or=decrease=the=pace=with=w
hich=the=sender=sends=data=to=the=receiver=-=ans-✔✔False
UDP=offers=basic=error=checking=-=ans-✔✔True
Assume=Hosts=A,=B,=and=C.=Host=A=has=a=UDP=socket=with=port=123.=Hosts=B=and=C
=each=send=their=own=UDP=segment=to=Host=A.=Hosts=B=and=C=cannot=use=the=same
=destination=port=123=for=sending=their=UDP=segment=-=ans-✔✔False
TCP=offers=in-order=delivery=of=the=packets,=flow=control,=and=congestion=control=-
=ans-✔✔True
TCP=detects=packet=loss=using=timeouts=and=triple=duplicate=acknowledgements=-
=ans-✔✔True
EXAM 1 STUDY SET SUMMER 2024
How=did=Licklider=and=his=team=in=the=early=1960s=experiment=with=a=precursor=to=the
=Internet?=-=ans-✔✔Connecting=two=computers=over=a=dial=up=telephone=line
What=is=the=Domain=Name=System=(DNS)=designed=to=do=primarily?=-=ans-
✔✔Translate=domain=names=into=IP=addresses
What=is=the=architectural=design=of=the=Internet=protocol=stack=based=on?=-=ans-
✔✔Layers
Both=the=data=link=and=transports=layer=protocols=may=provide=error=correction=-=ans-
✔✔True
What=allows=for=communication=between=the=application=layer=and=the=transport=layer
?=-=ans-✔✔Sockets
Which=of=the=following=protocols=belong=to=the=application=layer?
Ethernet
IP=(Internet=Protocol)=
DNS=(Domain=Name=Service)
UDP=(User=Datagram=Protocol)=-=ans-✔✔DNS=(Domain=Name=Service)
Which=two=protocols=belong=to=the=transport=layer?=
UDP=
TCP=
HTTP=
, IP=-=ans-✔✔UDP=and=TCP
When=an=application=sends=a=packet=of=information=across=the=network,=this=packet=tr
avels=down=the=IP=stack=and=undergoes=what=process?=-=ans-✔✔Encapsulation
According=to=the=end-to-
end=principle,=where=should=most=of=the=Internet's=functionality/
intelligence=be=implemented?=-=ans-✔✔At=the=edges=of=a=network
What=is=the=difference=between=hubs,=bridges,=and=routers?=-=ans-
✔✔They=operate=on=different=layers=of=the=IP=stack
The=transport=layer=protocols=offer=a=logical=connection=between=processes=only=if=the
=hosts=reside=in=the=same=network=-=ans-✔✔False
A=sending=host=receives=a=message=from=the=application=layer=and=encapsulates=it=wi
th=the=transport=layer=header=before=passing=it=down=to=the=network=layer=-=ans-
✔✔True
An=application=running=on=a=host=can=bind=to=multiple=sockets=simultaneously=-=ans-
✔✔True
The=identifier=of=a=UDP=socket=is=a=tuple=of=destination=IP=address=and=port=-=ans-
✔✔True
The=identifier=of=a=TCP=socket=is=a=tuple=of=source=IP=address=and=port=-=ans-
✔✔False
UDP=is=considered=more=lightweight=than=TCP=-=ans-✔✔True
One=of=the=functionalities=that=UDP=offers=is=to=increase=or=decrease=the=pace=with=w
hich=the=sender=sends=data=to=the=receiver=-=ans-✔✔False
UDP=offers=basic=error=checking=-=ans-✔✔True
Assume=Hosts=A,=B,=and=C.=Host=A=has=a=UDP=socket=with=port=123.=Hosts=B=and=C
=each=send=their=own=UDP=segment=to=Host=A.=Hosts=B=and=C=cannot=use=the=same
=destination=port=123=for=sending=their=UDP=segment=-=ans-✔✔False
TCP=offers=in-order=delivery=of=the=packets,=flow=control,=and=congestion=control=-
=ans-✔✔True
TCP=detects=packet=loss=using=timeouts=and=triple=duplicate=acknowledgements=-
=ans-✔✔True
