• CCNA Vol 1
    • Vol 1 Part 1: Intro
      • All Content Part 1
      • Ch01: Intro to TCP/IP
      • Ch02: Intro to Ethernet
      • Ch03: Intro Routing, WAN
    • Vol 1 Part 2: Ethernet
      • All Content Part 2
      • Ch04: Command Line
      • Ch05: Ethernet Switching
      • Ch06: Switch Management
      • Ch07: Switch Interfaces
    • Vol 1 Part 3: VLANs, STP
      • All Content Part 3
      • Ch08: Virtual LANs
      • Ch09: Spanning Tree
      • Ch10: RSTP and EtherChannel
    • Vol 1 Pt 4: IP Addresses
      • All Content Part 4
      • Ch11: IPv4 Subnetting
      • Ch12: Classful IPv4 Networks
      • Ch13: IPv4 Subnet Masks
      • Ch14: Analyzing IPv4 Subnets
      • Ch15: Subnet Design
    • Vol 1 Part 5: IP Routing
      • All Content Part 5
      • Ch16: Operating Routers
      • Ch17: Router Addresses and Routes
      • Ch18: Routing in LANs
      • Ch19: DHCP
      • Ch20: Troubleshooting Routing
    • Vol 1 Part 6: OSPF
      • All Content Part 6
      • Ch21: OSPF Concepts
      • Ch22: OSPF – Basic Features
      • Ch23: OSPF – Optional Features
      • 200-301 V1 Ch24: OSPF Neighbors
    • Vol 1 Part 7: IPv6
      • All Content Part 7
      • Ch25: IPv6 Fundamentals
      • Ch26: IPv6 Addressing
      • Ch27: Configure IPv6 Addressing
      • Ch28: IPv6 Addressing on Hosts
      • Ch29: Configure IPv6 Routing
  • CCNA Vol 2
    • Vol 2 Part 1: Wireless
      • All Content Part 1
      • Ch01: WLAN Fundamentals
      • Ch02: WLAN Architectures
      • Ch03: Securing WLANs
      • Ch04: Building WLANs
    • Vol 2 Part 2: IP ACLs
      • All Content Pt. 2
      • Ch05: TCP/IP Transport
      • Ch06: Standard ACLs
      • Ch07: Extended ACLs
      • Ch08: Applied ACLs
    • Vol 2 Part 3: Security Services
      • All Content Pt. 3
      • Ch09: Security Arch.
      • Ch10: Securing Devices
      • Ch11: Port Security
      • Ch12: DHCP Snooping & DAI
    • Vol 2, Part 4: IP Services
      • All Content Pt. 4
      • Ch13: Device Management Protocols
      • Ch14: NAT
      • Ch15: QoS
      • Ch16: FHRPs
      • Ch17: SNMP, FTP, TFTP
    • Vol 2 Part 5: Architectures
      • All Content Pt. 5
      • Ch18: LAN Architecture
      • Ch19: WAN Architecture
      • Ch20: Cloud Architecture
    • Vol 2 Part 6: Automation
      • All Content Pt. 6
      • Ch21: Controller-Based Networks
      • Ch22: Cisco SDA
      • Ch23: REST and JSON
      • Ch24: Ansible and Terraform
  • Labs
    • Config Labs, Volume 1
      • All Labs, Volume 1
      • Part 2 – Ethernet
      • Part 3 – VLAN, STP
      • Part 5 – IP Routing
      • Part 6 – OSPF
      • Part 7 – IPv6
    • Config Labs, Volume 2
      • All Labs, Volume 2
      • Part 2 – IP ACLs
      • Part 3 – Security
      • Part 4 – IP Services
      • CML-Free-Labs
  • Q&A
    • Q&A Set #1
    • IPv4 Ch. 11 Addressing Basics
    • IPv4 Ch. 12 Network Analysis
    • IPv4 Ch. 13 Mask Drills
    • IPv4 Ch. 14 Address Drills
    • IPv4 Ch. 15 Design Drills
    • IPv4 VLSM
    • IPv4-Adv Summary Routes
    • IPv6 Address Drills
    • OSPF Enabler
    • STP vs RSTP
    • STP Puzzle
  • General
    • Career
    • News
    • Study Tips
  • Reference
    • Product Links
    • Config Labs
    • Final Review
    • Comparing Book Editions
    Discussions to build real CCNA skills
    • CCNA Vol 1
      • Vol 1 Part 1: Intro
        • All Content Part 1
        • Ch01: Intro to TCP/IP
        • Ch02: Intro to Ethernet
        • Ch03: Intro Routing, WAN
      • Vol 1 Part 2: Ethernet
        • All Content Part 2
        • Ch04: Command Line
        • Ch05: Ethernet Switching
        • Ch06: Switch Management
        • Ch07: Switch Interfaces
      • Vol 1 Part 3: VLANs, STP
        • All Content Part 3
        • Ch08: Virtual LANs
        • Ch09: Spanning Tree
        • Ch10: RSTP and EtherChannel
      • Vol 1 Pt 4: IP Addresses
        • All Content Part 4
        • Ch11: IPv4 Subnetting
        • Ch12: Classful IPv4 Networks
        • Ch13: IPv4 Subnet Masks
        • Ch14: Analyzing IPv4 Subnets
        • Ch15: Subnet Design
      • Vol 1 Part 5: IP Routing
        • All Content Part 5
        • Ch16: Operating Routers
        • Ch17: Router Addresses and Routes
        • Ch18: Routing in LANs
        • Ch19: DHCP
        • Ch20: Troubleshooting Routing
      • Vol 1 Part 6: OSPF
        • All Content Part 6
        • Ch21: OSPF Concepts
        • Ch22: OSPF – Basic Features
        • Ch23: OSPF – Optional Features
        • 200-301 V1 Ch24: OSPF Neighbors
      • Vol 1 Part 7: IPv6
        • All Content Part 7
        • Ch25: IPv6 Fundamentals
        • Ch26: IPv6 Addressing
        • Ch27: Configure IPv6 Addressing
        • Ch28: IPv6 Addressing on Hosts
        • Ch29: Configure IPv6 Routing
    • CCNA Vol 2
      • Vol 2 Part 1: Wireless
        • All Content Part 1
        • Ch01: WLAN Fundamentals
        • Ch02: WLAN Architectures
        • Ch03: Securing WLANs
        • Ch04: Building WLANs
      • Vol 2 Part 2: IP ACLs
        • All Content Pt. 2
        • Ch05: TCP/IP Transport
        • Ch06: Standard ACLs
        • Ch07: Extended ACLs
        • Ch08: Applied ACLs
      • Vol 2 Part 3: Security Services
        • All Content Pt. 3
        • Ch09: Security Arch.
        • Ch10: Securing Devices
        • Ch11: Port Security
        • Ch12: DHCP Snooping & DAI
      • Vol 2, Part 4: IP Services
        • All Content Pt. 4
        • Ch13: Device Management Protocols
        • Ch14: NAT
        • Ch15: QoS
        • Ch16: FHRPs
        • Ch17: SNMP, FTP, TFTP
      • Vol 2 Part 5: Architectures
        • All Content Pt. 5
        • Ch18: LAN Architecture
        • Ch19: WAN Architecture
        • Ch20: Cloud Architecture
      • Vol 2 Part 6: Automation
        • All Content Pt. 6
        • Ch21: Controller-Based Networks
        • Ch22: Cisco SDA
        • Ch23: REST and JSON
        • Ch24: Ansible and Terraform
    • Labs
      • Mega Widget 4
      • Config Labs, Volume 1
        • All Labs, Volume 1
        • Part 2 – Ethernet
        • Part 3 – VLAN, STP
        • Part 5 – IP Routing
        • Part 6 – OSPF
        • Part 7 – IPv6
      • Config Labs, Volume 2
        • All Labs, Volume 2
        • Part 2 – IP ACLs
        • Part 3 – Security
        • Part 4 – IP Services
        • CML-Free-Labs
    • Q&A
      • Q&A Set #1
      • IPv4 Ch. 11 Addressing Basics
      • IPv4 Ch. 12 Network Analysis
      • IPv4 Ch. 13 Mask Drills
      • IPv4 Ch. 14 Address Drills
      • IPv4 Ch. 15 Design Drills
      • IPv4 VLSM
      • IPv4-Adv Summary Routes
      • IPv6 Address Drills
      • OSPF Enabler
      • STP vs RSTP
      • STP Puzzle
    • General
      • Career
      • News
      • Study Tips
    • Reference
      • Product Links
      • Config Labs
      • Final Review
      • Comparing Book Editions

    200-301 V1 Ch05: Ethernet Switching

    A: LAN Switching Logic
    By certskills
    In 200-301 V1 Ch05: Ethernet Switching, 200-301 V1 Part 2: Ethernet, CCENT-OLD, Q&A
    Posted August 31, 2015

    A: LAN Switching Logic

    It seems simple… and then you’re sitting at the #CCENT or #CCNA exam. Where does that Ethernet frame really go? I posted a question about LAN Switching a few days back. Here are the [...]

    READ MORE
    Q: LAN Switching Logic
    By certskills
    In 200-301 V1 Ch05: Ethernet Switching, 200-301 V1 Part 2: Ethernet, CCENT-OLD, Q&A
    Posted August 29, 2015

    Q: LAN Switching Logic

    To get your #CCENT and #CCNA, you must have the skill to predict how switches forward Ethernet frames. This skill goes beyond a simple generic list of actions like forward/filter/flood. This next [...]

    READ MORE
    More Answers: Switch Forwarding and What Happens Next
    By certskills
    In 200-301 V1 Ch05: Ethernet Switching, 200-301 V1 Part 2: Ethernet, CCENT-OLD, Q&A
    Posted April 13, 2015

    More Answers: Switch Forwarding and What Happens Next

    This post wraps up the discussion of the to the question listed in this earlier post – a question copied from the exam bank that comes with the ICND1 Official Cert Guide. Today’s post discussed [...]

    READ MORE
    Answers: Switch Forwarding and What Happens Next
    By certskills
    In 200-301 V1 Ch05: Ethernet Switching, 200-301 V1 Part 2: Ethernet, CCENT-OLD, Q&A
    Posted April 9, 2015

    Answers: Switch Forwarding and What Happens Next

    This post discusses the answers to the questions listed in the previous post. But what makes this question so challenging for someone headed for the ICND1 exam? Three things, in my opinion: 1) [...]

    READ MORE
    Switch Forwarding and What Happens Next
    By certskills
    In 200-301 V1 Ch05: Ethernet Switching, 200-301 V1 Part 2: Ethernet, CCENT-OLD, Q&A
    Posted April 7, 2015

    Switch Forwarding and What Happens Next

    Today’s post lists a question that comes with the ICND1 Official Cert Guide from Cisco Press. Here’s the story. I received a reader comment about this question, and I thought, wow, this one has [...]

    READ MORE
    Answers to the “LAN Switching Logic” Question
    By certskills
    In 200-301 V1 Ch05: Ethernet Switching, 200-301 V1 Part 2: Ethernet, CCENT-OLD, Q&A
    Posted June 6, 2014

    Answers to the “LAN Switching Logic” Question

    I posted a question about LAN Switching a few days back. Here are the answers! Post with any related clarifications or comments.

    READ MORE
    CCENT Question: LAN Switching Logic
    By certskills
    In 200-301 V1 Ch05: Ethernet Switching, 200-301 V1 Part 2: Ethernet, CCENT-OLD, Q&A
    Posted June 4, 2014

    CCENT Question: LAN Switching Logic

    Today’s post is a #CCENT question about the basics of LAN switching. It has a similar slant to some of the recent questions here in the blog, but focused on layer 2. I’ll post the [...]

    READ MORE
    Switch Learning Vs. Switch Forwarding: Answer
    By certskills
    In 200-301 V1 Ch05: Ethernet Switching, 200-301 V1 Part 2: Ethernet, CCENT-OLD, Q&A
    Posted May 9, 2014

    Switch Learning Vs. Switch Forwarding: Answer

    Today’s post wraps up this latest sample #CCENT exam question. Answer is below the fold. Relevant Links: The original question Related analysis of the question Other Q&A in this blog

    READ MORE
    Switch Learning Vs. Switch Forwarding – Analysis
    By certskills
    In 200-301 V1 Ch05: Ethernet Switching, 200-301 V1 Part 2: Ethernet, CCENT-OLD, Q&A
    Posted May 7, 2014

    Switch Learning Vs. Switch Forwarding – Analysis

    In many ways, the #CCENT and #CCNA are all about practice. Yes, you need to learn, but you need to practice applying what you learned if you want to do well on the exams. Today’s post looks at [...]

    READ MORE
    Switch Learning Vs. Switch Forwarding Question
    By certskills
    In 200-301 V1 Ch05: Ethernet Switching, 200-301 V1 Part 2: Ethernet, CCENT-OLD, Q&A
    Posted May 2, 2014

    Switch Learning Vs. Switch Forwarding Question

    For #CCENT and #CCNA, you need to know how switches learn, plus you need to know how switches forward frames. Sometimes, combining the two concepts (learning and forwarding) for the first time [...]

    READ MORE
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