Errata for BSCI Flash Cards

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Oct 28, 2013 (3 years and 10 months ago)

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Errata for BSCI Flash Cards


BSCI Section 2


Page 48, Question 17’s Answer: Second sentence under the “Classless”
category


change ‘classful’ to ‘classless’.


Page 58, Question 27’s Answer: Add to the answer: “BGP will also, under
certain conditions, sum
marize networks injected into the BGP database by a
local router. “


BSCI Section 3


Page 88, Question 25’s Answer: Change answer to: “
router (config
-
router)#
network [network_address] {wildcard_mask}



BSCI Section 4


Page 98, Question 5: Change question
to read: “Aside from configuration
parameters, what must be present in an OSPF hello for routers to become
neighbors?”


Page 104, Question 12’s Answer: Change neighbors to


neighbor.


Page 120, Question 27’s Answer: Add to the list: “Link
-
state acknowledge
ment”


BSCI Section 6


Page 188, Question 29’s Answer: Add as second sentence: “IGRP routes that
are automatically redistributed into EIGRP (IGRP and EIGRP processes having
the same AS number, running on the same router) also do not need a seed
metric.”



Errata for BSCI Quick Reference Sheets


NAT with Route Maps


Page 226


Remove “and destination” in the second sentence.



Classless IP Routing Protocols,

Classless Routing


Page 228


Add BGP to the list of classless routing protocols.


Comparing RIP a
nd IGRP


IGRP


Page 230, third paragraph, second sentence


Change “By default, RIP will be
enabled on… “ to “By default, RIP and IGRP will be enabled on …”



IP Routing Protocols,

Comparing Routing Protocols


Page 231, the table comparing routing proto
cols


Change the Timers for IS
-
IS to
read: Normal IS: Triggered (10/30), DIS 10 sec (3.3/10)



EIGRP Messages,

Packets


Page 232


In the first paragraph after the bullets, change the second sentence
to read “Hellos and ACKs are not acknowledged.”



Low
-
Level OSPF,

Neighborship


Page 239, under "Troubleshooting OSPF"


C
hange “show ip ospf interface
s


and show ip “ospf neighbor
s


to


show ip ospf interface” and “show ip ospf
neighbor”.


Page 240


Change the bullet list after “the following must match”
to:



Hello/dead timers



Area ID



Authentication type and password



Common subnet



Stub area flag


Page 240


Change the process of route exchange between two OSPF routers
to read:


1.

Down state:
no hellos sent

2.

Init state:

router sends hello packets out all O
SPF interfaces

3.

Two
-
way state:

router receives a hello from another router that contains
its own router ID in the neighbor list

4.

Exstart state:

routers determine who will start the exchange process

5.

Exchange state:

routers exchange DBDs listing the LSAs in t
heir LS
database by RID and sequence number.

6.

Loading state:

Each router compares the DBD received to the contents
of is LS database. It then sends a Link State Request for missing or
outdated LSAs. Each router responds to its neighbors LSR with a Link
St
ate Update. Each LSU is acknowledged.

7.

Full state:

The LS database has been synchronized with the adjacent
neighbor.


IS
-
IS,

IS
-
IS Acronyms


Page 243


The lower 5 rows should be included in the table.


Page 243, top left, third paragraph


Change all i
ntra
-
area to all inter
-
area.



Basic IS
-
IS Commands


Page 245


The lower 8 rows should be included in the table.


BGP,

Basic BGP Commands


Page 251


The lower 4 rows should be included in the table.


BGP Attributes


Page 253


In the table, under the d
escription of Weight, change ‘significant’ to
‘significance’.