Of queues required for the fifo scheduler 1 of queues

# of queues required for the FIFO scheduler =
# of queues required for the strict priority scheduler =
# of queues required for the weighted round robin scheduler =
6. (8%) Fill in the attributes for the protocols represented in the table below
1
4
4
Attribute Access Technology
ADSL Dial Up HFC PON
Topology
(point to point or multipoint)
Point to point Point to point multipoint multipoint
Asymmetric Service
(YES or NO)
YES YES YES YES
Media type
(TP or Coax or Fiber)
TP TP Coax and Fiber Fiber
Supports single play, double
play, or triple play?
double Single (double but
not well)
triple triple
Name of the Device in the
WAN that terminates the
Access line
DSLAM Circuit switch CMTS OLT
Name of the Device in the
customer location that
terminates the Access line
DSL modem Dial up modem Cable modem ONT
TDC 460 Homework 02 7 of 9

TDC-460 Spring 2017
7. (8%) Fill in the attributes for the protocols represented in the table below
Attribute Protocol
X.25 Frame Relay ATM Carrier
Ethernet
OSI Layer number(s)
Connection Type
(CO vs Connectionless)
Virtual Circuit vs
Datagram switching
Link Flow Control
(YES or NO)
Link Error Control
(YES or NO)
MAC support
(YES or NO)
Used in WAN or LAN ?
Fixed or variable
frame size?
Guaranteed QoS
support?
(YES or NO)
8. An enterprise has the following UNI traffic profile SLA with a WAN data operator
 CIR = 8000bps, CBS = 1000B, EIR = 1600bps, EBS = 500B
 TrTCM (Two rate, three color mode) policer is utilized on the ingress WAN switch
 Assume token bucket algorithm is used, bucket initially starts full
Three frames (frame #1, frame #2 and frame #3) arrive at the ingress port of the WAN
switch. Frame #1 = 900B in size arrives at t=0 sec. Frame #2 = 400B in size arrives at
t=0.25 sec. Frame #3 =1000B in size arrives at t=0.50 sec.
a) (2%) what color does the policer mark frame #1 with and does it drop or forward it?
Show your work.
b) (2%) what color does the policer mark frame #2 with and does it drop it? Show your
work.