NETW2 Logs

The core set: show interfaces, show running-config/show startup-config, show flash, show version, show ip/ipv6 interface, and show mac-address-table. Command What It Shows show interfaces [interface-id] Interface status, statistics, speed, duplex, errors show startup-con...

Quiz: NETW2 / Basic Device Configuration | updated: Aug 27, 2026

Two per interface: a link-local address (FE80::), valid only on the local link, and a globally routable global unicast address. * Every IPv6 interface has a link-local address; the global one is configured. * R1# show ipv6 interface brief GigabitEthernet0/0/0 [up/up] FE80::72...

Quiz: NETW2 / Basic Device Configuration | updated: Aug 27, 2026

Runts are frames under 64 bytes, giants exceed 1,518 bytes, and CRC errors are checksum mismatches — all counted by show interfaces and usually pointing at bad NICs, cabling, or interference. Error Type Description Common Cause Runts Frames smaller than 64 bytes (minimum E...

Quiz: NETW2 / Basic Device Configuration | updated: Aug 27, 2026

First parameter = physical layer (is there a carrier?); second parameter = data link layer (are protocol keepalives arriving?). * The four show interfaces status/protocol states. * Example: FastEthernet0/18 is up, line protocol is up (connected) State Combination Meaning Like...

Quiz: NETW2 / Basic Device Configuration | updated: Aug 27, 2026

C marks a directly connected network (the whole subnet); L marks the local /32 host route for the router's own interface address. * One configured interface, two entries in the routing table. * R1# show ip route C 192.168.10.0/24 is directly connected, GigabitEthernet0/0/0 L...

Quiz: NETW2 / Basic Device Configuration | updated: Aug 27, 2026

Telnet sends everything — including the password — in plaintext that a sniffer reads directly; SSH encrypts the whole session. * Telnet is plaintext; SSH encrypts the session. * Feature Telnet SSH Port TCP (Transmission Control Protocol) 23 TCP 22 Encryption None — plai...

Quiz: NETW2 / Basic Device Configuration | updated: Aug 27, 2026

Sets the BOOT environment variable that tells the switch which IOS image to load from flash; if it is not set, the switch just loads the first executable file it can find. * Setting BOOT makes the running image a decision rather than an accident. * S1(config)# boot system flash:...

Quiz: NETW2 / Basic Device Configuration | updated: Aug 27, 2026

Start with show interfaces, then branch: if it's up but faulty chase noise/duplex; if it's down chase cabling/speed; if still unsolved, document and escalate. * The access-layer troubleshooting decision flow. * Flowchart: Run show interfaces Is the interface up? YES (up/up but...

Quiz: NETW2 / Basic Device Configuration | updated: Aug 27, 2026

section, include, exclude, and begin — each piped after a show command with the | character to trim its output. Syntax: show [command] | [filter] [expression] Filter Function Example section Shows the entire section starting with the match show running-config | section vty...

Quiz: NETW2 / Basic Device Configuration | updated: Aug 27, 2026

Verify SSH support → set IP domain → generate RSA keys → create a local user → configure the VTY (Virtual Teletype) lines for SSH → force SSH version 2. * The six steps to enable SSH. * Prerequisites: The switch must have a unique hostname and correct network settings. Step A...

Quiz: NETW2 / Basic Device Configuration | updated: Aug 27, 2026