Networking Concepts Review - CCIE Routing and Switching Exam Certification Guide - page 48

Decimal, Binary, and Hexadecimal Numbers (Continued) Table 2-8

Decimal
Value Hexadecimal Binary

6 6 0110

7 7 0111

8 8 1000

9 9 1001

10 A 1010

11 B 1011

12 C 1100

13 D 1101

14 E 1110

15 F 1111

16 10 10000

Hierarchical Model

Table 2-9

Layer Description

Core High-speed transport, high reliability, and low latency

Distribution Access lists, distribution lists, route summarization, VLAN routing, security policy,

address aggregation, address filters, encryption, compression, and quality of service

Access Remote Access Servers, shared and switched bandwidth, MAC filtering, and segmentation

Networking Devices

Table 2-10

Device OSI Layer Function

Hub/ repeater Physical Forwards bits out all interfaces. Protocol transparent.

Bridge/ switch Data-link Forwards frames based on MAC table. Protocol transparent. Controls

collision (bandwidth) domain.

Router/ L3 switch Network Forwards packets based on learned routing table. Protocol aware.

Controls broadcast domain.

IGP and EGP Routing Protocols Table 2-11

Type Routing Protocols

EGP BGP, EGP

IGP RIPv1, IGRP, OSPF, EIGRP, RIPv2, IS-IS