H6 (Routers)

Question 1

What is in a host routing table

Answer 1

Interface list: All known interfaces + MAC
IPv4 route table: Dest, Mask, Gateway, Interface, Metric
IPv6 route table

Question 2

When is the table used?

Answer 2

For local addresses, otherwise it is forwarded to a router.

Question 3

Routes in the router table

Answer 3

Directly-connected routes
Remote routes
Default route

Question 4

Command to show table on router

Answer 4

show ip route

Question 5

Explain route format

Answer 5

S-Static D-EIGRP O-OSPF
Dest network
Administrative distance, lower is better
Metric. Lower is better
Via next hop address
Timestamp
Interface

Question 6

The components of a router

Answer 6

CPU
OS
Memory
    RAM
    ROM
    NVRAM
    FLASH

Question 7

What is stored in the different pieces of memory

Answer 7

RAM: IOS Image, run conf, arp, buffer
ROM: bootup-info, POST, backup IOS
NVRAM: startup conf
Flash: IOS

Question 8

The 3 ways of accessing a router

Answer 8

SSH
Telnet
Console, out of band connection just for maintenance

Question 9

Name the 4 steps of booting a router

Answer 9

1. POST
2. Load bootstrap
3. Try load IOS, find it usint TFTP or troubleshoot with limited OS
4. Copy conf from NVRAM, otherwise TFTP otherwise setup mode

Question 10

command used to show versoin

Answer 10

show version

Question 11

What are the 2 modes

Answer 11

User and Priv EXEC

Question 12

Why is a default gateway usefull on a switch

Answer 12

To make VLAN1 accessable from a remote network