Extra Questions 3

Question 1

Which routing protocols are classless (support VLSM/send subnet mask info) and which are classful?

Answer 1

Classless: They send subnet mask info and thus support VLSM
- OSPF
- ISIS
- EIGRP
- RIPv2
- BGP

Classful: Do not send subnet mask info
- RIPv1
- IGRP

Question 2

Which network discovery protocol allows devices to advertise their identity, capabilities, and neighboring devices, facilitating network management and troubleshooting?

Answer 2

• LLDP
• CDP

Question 3

Whats the difference between SSE and traditional perimeter-based security approaches?

Answer 3

SSE is cloud native, uses ZeroTrust and integrates threat intelligence to detect and respond to security incidents

Perimeter-based approaches seperate the trusted internal network from the untrusted outside world.

Question 4

Which routing protocol is best for what?

Answer 4

RIPv2: Best for small scale networks
EIGRP: Medium to Large scale Cisco networks
OSPF: Large multivendor networks
ISIS: Large ISP or carrier networks
BGP: Internet and inter-AS routing between organizations or ISPs.

Question 5

What is the purpose of a non-authoritative DNS?

Answer 5

It caches information from previous queries and provides those information.

Question 6

What tool to use to detect Opens/Shorts what to measure voltage, resistance and amperage?

Answer 6

1. Cable certifier
2. Multimeter

Question 7

What is the RS-232 protocol and what connector does it use?

Answer 7

A serial connection protocol/standard used to connect DTE (Endpoint) to DCE (Switch/Router), through the console port.
It uses a DB-9 connector.

Question 8

What is SAN?

Answer 8

SAN (Storage Area Network): A dedicated high-speed network that connects servers to storage devices.
It uses Fibre Channel, iSCSI, or NVMe over Fabrics.

Question 9

What is iSCSI?

Answer 9

Enables servers to access remote storage as if it were local. Its used for SAN (Storage Area Network).

Question 10

What is EAP?

Answer 10

EAP (Extensible Authentication Protocol) supports multiple authentication methods (passwords, certificates, tokens).

Used in Wi-Fi (WPA/WPA2/WPA3), VPNs, and 802.1X.

Question 11

What is POTS?

Answer 11

POTS (Plain Old Telephone Service): Traditional analog voice telephone service.

Question 12

What is PPP?

Answer 12

PPP (Point-to-Point Protocol): A data link layer protocol for direct connections between two nodes with authentication, compression and error detection.

Question 13

What is LWAPP?

Answer 13

LWAPP (Lightweight Access Point Protocol): Protocol for centralized management of Wi-Fi access points.
The modern verision is CAPWAP.

Question 14

What is EBCDIC?

Answer 14

A character encoding used mainly on IBM mainframes.

Question 15

What is considered by all routers/protocol for route selection?

Answer 15

The prefix length of the destination network address, longer = better

Question 16

What is a unique feature of EIGRP?

Answer 16

It supports unequal cost load balancing.

Question 17

What is DHCP Snooping?

Answer 17

DHCP snooping is a series of techniques applied to improve the security of a DHCP infrastructure.