@@QUES 010101 Y/N Q,161,376,272,273
Do you think that Enhanced IGRP is compatible with IGRP routers?
|
1
|

|
You're right.
|
In fact, it is.
|
The answer is Yes.

@@QUES 010102 SXY Q,118,410,350,299
See if you can identify how an enhanced IGRP router first attempts to identify a new route when the current route becomes unusable.
|
Choose an option.
|
It queries its neighbors
It examines routing tables compiled from its neighbors
|

|
2
|
That's right.
|
Actually, this happens only if it can't identify a new route from the routing tables compiled from its neighbors. The correct option is now highlighted.
|
The correct option is now highlighted.

@@QUES 010103 MXY Q,131,393,318,284
When do you think an Enhanced IGRP router updates its routing tables?
|
Choose each appropriate item.
|
When a routing path changes
When a metric for a route changes
At regular intervals
|

|
1,2
|
That's right.
|
Partly right. The correct options are now highlighted.
|
You have not made any correct choices. The correct options are now highlighted.
|
The correct options are highlighted.

@@QUES 010104 T/F Q,242,447,261,327
Do you think the following statement is true or false?

The new routing information is sent to all the router's neighbors.
|
2
|

|
That's right.
|
Actually, the statement is false.
|
The statement is false.

@@QUES 010105 Y/N Q,36,330,256,274
Would you say that this is sufficient for most IP networks?
|
1
|

|
You're right.
|
In fact, it is.
|
The answer is Yes.

@@QUES 010106 T/F Q,127,409,321,333
Do you think the following statement is true or false?

For each network layer protocol supported by Enhanced IGRP, a separate set of tables must be maintained.
|
1
|

|
That's right.
|
In fact, the statement is true.
|
The statement is true.

@@QUES 010107 XYF Q,285,450,295,333
See if you can choose the correct option to fill in the blank.

The results of the decisions made by DUAL are stored in  _  tables.
|
Choose an option to fill the blank.
|
%010routing
%010topology
%010neighbor
|

|
1
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The full statement is now shown.

@@QUES 010108 SXY Q,146,413,298,336
See if you can tell why an Enhanced IGRP router uses neighbor discovery.
|
Choose an option.
|
In order to inform neighbors of routing updates
In order to make other routers aware of its existence
In order to locate other Enhanced IGRP routers
|

|
3
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The correct option is now highlighted.

@@QUES 010109 Y/N Q,161,386,261,290
Do you think that all packets sent by Enhanced IGRP routers need to be transmitted reliably?
|
2
|

|
You're right. Some packets don't need to be transmitted reliably.
|
In fact, some packets don't need to be transmitted reliably.
|
The answer is No.

@@QUES 010201 SXY Q,122,342,351,312
Which of the following would you say best describes when hello packets are multicast?
|
Choose an option.
|
Only when the router is first connected to the network
At regular intervals
Only when there is a topology change
|

|
2
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The correct option is now highlighted.

@@QUES 010202 Y/N Q,174,352,231,268
Do you think that updates are transmitted reliably?
|
1
|

|
You're right.
|
In fact, they are.
|
The answer is Yes.

@@QUES 010203 T/F Q,145,404,303,321
Do you think the following statement is true or false?

Each Enhanced IGRP router must respond to any received query packets.
|
1
|

|
That's right.
|
In fact, the statement is true.
|
The statement is true.

@@QUES 010301 XYF Q,128,348,342,332
See if you can choose the correct option to fill in the blank.

These tables are built based on the reception of  _  packets from neighbors.
|
Choose an option to fill the blank.
|
%010hello
%010reply
%010update
|

|
1
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The full statement is now shown.

@@QUES 010302 SXY Q,137,393,311,299
See if you can identify the type of table an Enhanced IGRP router uses to store a neighbor's routing information.
|
Choose an option.
|
Routing
Topology
Neighbor
|

|
2
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The correct option is now highlighted.

@@QUES 010303 SXY Q,205,322,301,304
What do you think happens next?
|
Choose an option.
|
DUAL updates the appropriate routing table with that successor and its destination
Query packets are sent to determine whether neighbors have a more cost effective route to the destination
|

|
1
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The correct option is now highlighted.

@@QUES 010304 XYF Q,149,367,286,327
See if you can choose the correct option to fill in the blank.

If the current path is in operation, a destination is in the  _  state.
|
Choose an option to fill the blank.
|
%010active
%010passive
|

|
2
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The full statement is now shown.

@@QUES 010401 Y/N Q,186,365,236,267
Do you think it likely that routing information is currently being transmitted?
|
2
|

|
You're right. There is no need to transmit this information because the network is stable.
|
In fact, there is no need to transmit routing information when the network is stable. The answer is No.
|
The answer is No.

@@QUES 010402 MXY Q,373,411,255,308
Besides router C, which of the following routers would be included in router E's topology table entries?
|
Choose each appropriate item.
|
A
B
D
|

|
3
|
That's right.
|
Partly right. The only correct option is now highlighted.
|
You have not made any correct choices. The only correct option is now highlighted.
|
The only correct option is highlighted.

@@QUES 010403 SXY Q,101,358,388,336
Router C and router E began their routing updates at virtually the same time.

Which of the following paths to router A do you think router E sends to router C in its reply packet?
|
Choose an option.
|
The new path, because router E has already updated its routing table
The old path, because router E has not finished updating its routing table
|

|
1
|
That's right.
|
That's not it. The correct option is now highlighted.
|
The correct option is now highlighted.

@@QUES 010404 T/F Q,384,382,238,309
Do you think the following statement is true or false?

Next, the router multicasts an update to all its neighbors.
|
2
|

|
That's right. First, DUAL must calculate a successor to router A.
|
Actually, DUAL must first calculate a successor to router A. The statement is false.
|
The statement is false.

@@QUES 010101t MXY Q,0,0,385,324
Identify the true statement(s) about Enhanced IGRP.
|
Choose each appropriate item.
|
It is not compatible with IGRP
It offers features found in distance vector and link state routing protocols
It updates all routers periodically
It offers multiple network layer support
|
2,4
|
28
|
Correct.
|
7 per correct decision
|
Partly right. The correct options are now highlighted.
|
You have not made any correct choices. The correct options are now highlighted.

@@QUES 010102t MXY Q,0,0,341,350
Identify the types of tables that must be separately maintained for each network layer protocol supported by Enhanced IGRP.
|
Choose each appropriate item.
|
Topology
SAP
Routing
Neighbor
|
1,3,4
|
28
|
Correct.
|
7 per correct decision
|
Partly right. The correct options are now highlighted.
|
You have not made any correct choices. The correct options are now highlighted.

@@QUES 010103t MXY Q,0,0,414,402
Identify the true statement(s) regarding routing updates made by routers running Enhanced IGRP.
|
Choose each appropriate item.
|
When a route becomes unusable, the router automatically sends query packets in order to identify a new route
If a new route cannot be found by using the query packets, the router checks the table of routing information it compiled from its neighbors
When a new route is found, all the router's neighbors are notified
Updates occur only when there is a specific need for them
|
4
|
28
|
Correct.
|
7 per correct decision
|
Partly right. The only correct option is now highlighted.
|
You have not made any correct choices. The only correct option is now highlighted.

@@QUES 010104t MXY Q,0,0,309,350
The protocol-dependent modules used in Enhanced IGRP routers are responsible for which of the following?
|
Choose each appropriate item.
|
Sending and receiving packets
Maintaining topology tables
Parsing incoming packets
Making routing decisions
|
1,2,3
|
28
|
Correct.
|
7 per correct decision
|
Partly right. The correct options are now highlighted.
|
You have not made any correct choices. The correct options are now highlighted.

@@QUES 010105t MXY Q,0,0,404,337
Identify the tasks that can be shared between network layer protocols with an Enhanced IGRP router.
|
Choose each appropriate item.
|
Neighbor discovery
Route processing
Use of reliable transport protocol
Use of the DUAL finite state machine
|
1,2,3,4
|
28
|
Correct.
|
7 per correct decision
|
Partly right. All the options are correct and are now highlighted.
|
You have not made any correct choices. All the options are correct and are now highlighted.

@@QUES 010201t MXY Q,0,0,239,371
Identify the packet types that must be transmitted reliably.
|
Choose each appropriate item.
|
Hello
Acknowledgment
Update
Query
Reply
Request
|
3,4,5
|
36
|
Correct.
|
6 per correct decision
|
Partly right. The correct options are now highlighted.
|
You have not made any correct choices. The correct options are now highlighted.

@@QUES 010202t MXY Q,0,0,376,350
Identify the true statement(s) about hello packets.
|
Choose each appropriate item.
|
They are used to discover neighbors
Routers determine that neighbors are operating based on the neighbors' reception of the transmitting router's hello packets
They are transmitted only when the routing table needs updating
They are always multicast
|
1,4
|
28
|
Correct.
|
7 per correct decision
|
Partly right. The correct options are now highlighted.
|
You have not made any correct choices. The correct options are now highlighted.

@@QUES 010203t DTF Q,169,414,301,327
_______  packets are sent in response to query packets.

_______  packets are sent in response to other types of packets that need to be transmitted reliably.
|
Choose an option to fill the first blank.
|
Choose an option to fill the second blank.
|
Acknowledgment
Reply
|
2
|
Correct.
|
10
|
Incorrect. It's the other way around.
|
0
|
Incorrect.
|
0
|
Incorrect.
|
0
|
The full statements are now shown.

@@QUES 010204t MXY Q,0,0,416,323
When do Enhanced IGRP routers send update packets?
|
Choose each appropriate item.
|
When requested routing information is stored in its routing table
When a neighbor has been discovered
When a route has become disabled
When a metric has been changed
|
2,4
|
28
|
Correct.
|
7 per correct decision
|
Partly right. The correct options are now highlighted.
|
You have not made any correct choices. The correct options are now highlighted.

@@QUES 010301t SXY Q,115,421,424,365
What is a hold time as it pertains to a hello packet?
|
Choose an option.
|
The amount of time during which the receiving neighbor is assumed to be operational
The amount of time during which the transmitting neighbor is assumed to be operational
The amount of time within which a receiving neighbor must send a hello packet
The amount of time within which a receiving neighbor must send an acknowledgment packet
|
2
|
20
|
Correct.
|
Incorrect. The correct option is now highlighted.

@@QUES 010302t MXY Q,0,0,334,356
Which of the following items would you find in a topology table entry?
|
Choose each appropriate item.
|
A destination address
The neighbor that offers the best route to that destination
Other neighbors associated with that destination
The metrics each neighbor advertises for reaching that destination
|
1,2,3,4
|
28
|
Correct.
|
7 per correct decision
|
Partly right. All the options are correct and are now highlighted.
|
You have not made any correct choices. All the options are correct and are now highlighted.

@@QUES 010303t MXY Q,95,456,435,451
When an Enhanced IGRP router does not send a hello packet within the hold time specified in its previous hello packet, the router is determined to be unreachable.

Which of the following can occur as a result?
|
Choose each appropriate item.
|
DUAL checks the neighbor table for a new route to replace the unreachable one
Both the neighbor table and the topology table are updated
Neighbors continually transmit hello packets to the unreachable router until such a time as it receives an acknowledgment
Query packets may be sent in order to identify a new route
|
2,4
|
28
|
Correct.
|
7 per correct decision
|
Partly right. The correct options are now highlighted.
|
You have not made any correct choices. The correct options are now highlighted.

@@QUES 010304t XYF Q,0,0,340,350
When DUAL cannot locate a successor from a topology table, the destination listed in the topology table enters _________ state.
|
Choose an option to fill the blank.
|
%010active
%010passive
%010looped
%010inoperable
|
1
|
20
|
Correct.
|
Incorrect. The correct option is now highlighted.
|
The full statement is now shown.

@@QUES 010401t MXY Q,0,0,386,428
Assume that a router has dynamically established a path to a destination.

Which of the following statement(s) is true?
|
Choose each appropriate item.
|
The path was initially established by the router, and not by the network administrator
There is no successor listed in the topology table entry for that destination
If the path is lost, the router must send query packets to establish a new one
When query packets are sent, the topology table entry for that destination must be placed in the active state
|
1,4
|
28
|
Correct.
|
7 per correct decision
|
Partly right. The correct options are now highlighted.
|
You have not made any correct choices. The correct options are now highlighted.

@@QUES 010402t SXY Q,0,0,456,414
Assume that router A has experienced a topology change, and as a result a new path to router E must be recomputed.

Router A has sent query packets and received reply packets.

What happens next?
|
Choose an option.
|
DUAL calculates a new successor to router E.
Router A multicasts an update to its neighbors.
Router A's topology table entry for router E is returned to a passive state.
Router A's topology table entry for router E is returned to an active state.
|
3
|
20
|
Correct.
|
Incorrect. The correct option is now highlighted.

@@QUES 010403t MXY Q,0,0,422,440
Assume that two routers need to perform a routing table update in order to locate a successor to a destination.

One router identifies a successor from its topology table, the other router cannot.

Which of the following is done by both routers in performing the update?
|
Choose each appropriate item.
|
Query packets are sent to neighbors
The appropriate topology table entry is placed in an active state
DUAL calculates a new successor
Once the routing table has been updated, update packets are transmitted to all neighbors
|
3
|
28
|
Correct.
|
7 per correct decision
|
Partly right. The only correct option is now highlighted.
|
You have not made any correct choices. The only correct option is now highlighted.
|
|
|
|
|
|

