| 1 | What is an intermediate system? |
| 2 | What is a Network Protocol Data Unit? |
| 3 | What is the difference between an L1, an L2, and an L1/L2 router? |
| 4 | What is the default level of a Cisco router? |
| 5 | Explain the basic difference between an IS-IS area and an OSPF area. |
| 6 | What adjacency types, if any, are formed between two L1/L2 routers with the same Area IDs? What if the AIDs of the L1/L2 routers are different? |
| 7 | What adjacency types, if any, are formed between two L2-only routers with the same AIDs? What if the AIDs of the L2-only routers are different? |
| 8 | What is a network entity title (NET)? |
| 9 | To what value must the NSAP Selector be set in a NET? |
| 10 | What is the purpose of a System ID? |
| 11 | How does a router determine what area it is in? |
| 12 | Does IS-IS elect a Backup Designated Router on a broadcast subnetwork? |
| 13 | What is the purpose of the Pseudonode ID? |
| 14 | What is the default maximum age (MaxAge) of an IS-IS LSP? What is the maximum configurable MaxAge? |
| 15 | What is the basic difference between the way OSPF ages its LSAs and the way IS-IS ages its LSPs? |
| 16 | How often does an IS-IS router refresh its LSPs? |
| 17 | What is a Complete Sequence Number Packet (CSNP)? How is it used? |
| 18 | What is a Partial Sequence Number Packet (PSNP)? How is it used? |
| 19 | What is the purpose of the Overload (OL) bit? |
| 20 | What is the purpose of the Attached (ATT) bit? |
| 21 | What is the purpose of the Up/Down bit? |
| 22 | What metrics are specified by the ISO for IS-IS? How many of these metrics does the Cisco IOS support? |
| 23 | What are the two default metric styles and what are their maximum values? |
| 24 | What is the maximum metric value of an IS-IS route? |
| 25 | What is the difference between a level 1 IS-IS metric and a level 2 IS-IS metric? |
| 26 | What is the difference between an internal IS-IS metric and an external IS-IS metric? |
| 27 | How many adjacencies are created on a single link between two routers running both IPv4 and IPv6 in single topology mode? How many in multi-topology mode? |
| 28 | How many L1 areas can be active on a single router? How many L2 areas? |
| 29 | What are the two mesh group modes other than Inactive, and what are the advantages and disadvantages of each? |
