NWC203c - BĐFC - Course 3 Already Graded A+
Which layer LAN bridges work on?
point
a. Transport layer
b. Network layer
c. Medium access control
d. None of above ✅c
One can use repeaters, bridges and routers to interconnect two LANs. Which of the following
approaches will make local traffic stay in its own LAN? (2 answers)
point
a. routers
b. bridges
c. All of the above
d. repeaters ✅a, b
Of the following network layer functions, which one is optional?
point
a. Routing
b. Forwarding
c. Congestion control
d. None of the above ✅c
Of the following, which is a basic function of transparent bridge?
point
a. All of the above
,b. Learns where stations are attached to the LAN
c. Prevents loops in the topology
d. Forwards frames from one LAN to another ✅a
It is possible for a network layer to provide a choice of services to the user of the network. Which of
following the IP network layer offers
point
a. connection-oriented reliable stream service
b. All of the above
c. connection-oriented transfer of packets with delay guarantee
d. Best-effort connectionless service ✅d
The network layer is considered the most complex layer because of the following reasons (3 answers)
point
a. User scalability
b. Challenges such as addressing and routing
c. Requires coordinated actions of multiple, geographically distributed network elements
d. Responsible for displaying received information to users ✅a, b, c
An end-to-end function is best implemented at a lower level than at a higher level
point
a. True
b. False ✅b
Which of the following is an essential network function
point
a. Forwarding
, b. Routing
c. Priority and scheduling
d. All of the above ✅d
In network layer, which of the following statement is true for packet networks
point
a. Individual packet streams are highly bursty
b. User demand can undergo dramatic change
c. Internet structure is highly decentralized
d. All of the above ✅d
The main purpose of access multiplexer is to combine the typically bursty traffic flows from the
individual computers into aggregate flows
point
a. True
b. False ✅a
Which of the following functions can a home router perform?
point
a. Private IP addresses in home by network address translation
b. All of the above
c. Local area network access using WiFi
d. Single global IP address using DHCP ✅b
Consider a three hop network from the source to the destination. Let m be the packet transmission time
at each hop. Let n be the propagation delay at each hop. Assume there is no queuing delay and
processing time at each hop. Based on store-and-forward, what is the total time for the packet to be
transmitted to the destination?
point
a. m + n
Which layer LAN bridges work on?
point
a. Transport layer
b. Network layer
c. Medium access control
d. None of above ✅c
One can use repeaters, bridges and routers to interconnect two LANs. Which of the following
approaches will make local traffic stay in its own LAN? (2 answers)
point
a. routers
b. bridges
c. All of the above
d. repeaters ✅a, b
Of the following network layer functions, which one is optional?
point
a. Routing
b. Forwarding
c. Congestion control
d. None of the above ✅c
Of the following, which is a basic function of transparent bridge?
point
a. All of the above
,b. Learns where stations are attached to the LAN
c. Prevents loops in the topology
d. Forwards frames from one LAN to another ✅a
It is possible for a network layer to provide a choice of services to the user of the network. Which of
following the IP network layer offers
point
a. connection-oriented reliable stream service
b. All of the above
c. connection-oriented transfer of packets with delay guarantee
d. Best-effort connectionless service ✅d
The network layer is considered the most complex layer because of the following reasons (3 answers)
point
a. User scalability
b. Challenges such as addressing and routing
c. Requires coordinated actions of multiple, geographically distributed network elements
d. Responsible for displaying received information to users ✅a, b, c
An end-to-end function is best implemented at a lower level than at a higher level
point
a. True
b. False ✅b
Which of the following is an essential network function
point
a. Forwarding
, b. Routing
c. Priority and scheduling
d. All of the above ✅d
In network layer, which of the following statement is true for packet networks
point
a. Individual packet streams are highly bursty
b. User demand can undergo dramatic change
c. Internet structure is highly decentralized
d. All of the above ✅d
The main purpose of access multiplexer is to combine the typically bursty traffic flows from the
individual computers into aggregate flows
point
a. True
b. False ✅a
Which of the following functions can a home router perform?
point
a. Private IP addresses in home by network address translation
b. All of the above
c. Local area network access using WiFi
d. Single global IP address using DHCP ✅b
Consider a three hop network from the source to the destination. Let m be the packet transmission time
at each hop. Let n be the propagation delay at each hop. Assume there is no queuing delay and
processing time at each hop. Based on store-and-forward, what is the total time for the packet to be
transmitted to the destination?
point
a. m + n
