Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

INFO5082 - Multilayer Switching > Review - Chapter 3 > Flashcards

Review - Chapter 3 Flashcards

1
Q

VLAN Classification

A

○ End-to-end (campus wide)

○ Local (geographic)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

VLAN Mapping Classification

A

○ Port-centric (static)

○ Dynamic (MAC address based) with a VLAN Management Policy Server (VMPS)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

VLAN Segmentation

A

Switches filter the broadcast from all the ports or devices that are not part of the same VLAN

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Campus network design models

A

○ End-to-end VLANs

○ Local VLANs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

End-to-end VLANs

A

A single VLAN that is associated with switch ports widely dispersed throughout an enterprise network on multiple switches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Local VLANs

A

Generally confined to a wiring closet; VLANs are local to a single access switch and connect via trunk to an upstream distribution switch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Reasons for Implementing End-to-End Design

A
  • Grouping users
  • Security
  • Applying QoS
  • Routing avoidance
  • Special-purpose VLAN
  • Poor design
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Benefits of using local VLANs in enterprise campus architecture design

A 
○ Deterministic traffic flow
○ Active redundant paths
○ High availability
○ Finite failure domain
○ Scalable design
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

VLAN Configuration Modes

A
  • Database Mode
  • Global Mode
  • Assign Ports
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

VLAN Trunks

A

Point-to-point links that carry traffic for multiple VLANs across a single physical link between the two switches or any two devices

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Architectural Advantages of 802.1Q/802.1p Over ISL

A
  • Smaller frame overhead, thus more efficient (4 bytes to 30 bytes)
  • Widely supported industry standard protocol
  • Has the support for 802.1p fields for QoS
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

MTU

A

To process an 802.1Q tagged frame, a device must enable a maximum transmission unit (MTU) of 1522 or higher

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Baby Giants

A

Frames that are larger than the standard MTU of 1500 bytes but less than 2000 bytes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

ISL MTU

A

1548 bytes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

802.1Q MTU

A

1522 bytes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Dynamic Trunking Protocol (DTP)

A

Used on trunk ports to negotiate the trunking state

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

DTP Modes

A 
○ Desirable
○ Auto
○ On
○ Off
○ Nonegotiate
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

VLAN Ranges

A
  • ISL: 1-1005

* 802.1Q: 1-4094

19
Q

Two WLAN Implementations

A

○ Standalone WLAN based on autonomous access points (APs)

○ Controller-based WLAN based on controller-based APs and WLCs (Wireless LAN Controllers)

20
Q

VLAN Trunking Protocol (VTP)

A

Used to distribute and synchronize information about VLAN databases configured throughout a switched network

21
Q

VTP Messages

A

Transmitted only on trunks over the management VLAN (default: VLAN 1) every 5 minutes using Layer 2 multicast frame

22
Q

VTP Domain

A

○ One switch or several interconnected switches sharing the same VTP environment
○ Switches can only be in one VTP domain at any time
○ Default: (until manually configured or it receives an advertisement for a domain over trunk link)

23
Q

VTP Modes

A

○ Server
○ Transparent
○ Client

24
Q

Server Mode (VTP)

A

○ Default mode
○ VLANs not propagated until management domain name is specified/learned
○ Changes are propagated to all switches in the VTP domain, transmitted out all trunk connections

25
Q

Transparent Mode (VTP)

A

○ Doesn’t participate in VTP
○ VLAN configuration changes only affect the local switch (doesn’t propagate)
○ Does forward VTP advertisements received within the domain

26
Q

Client Mode (VTP)

A

Transmits and receives VTP updates on trunks but cannot create, change, or delete VLANs

27
Q

VTP Version 2 features offered that Version 1 doesn’t

A

□ Version-dependent transparent mode
□ Consistency check
□ Token ring support
□ Unrecognized type-length-value support

28
Q

VTP Version 3 Properties

A 
□ Extended VLAN support
□ Domain name not auto learned
□ Better security
□ Better database propagation
□ MST support
29
Q

VTP Authentication

A

○ VTP password feature
○ Uses MD5 algorithm to encode passwords in 16-byte words
○ Passwords are case sensitive and can be 8-64 characters long

30
Q

VTP Advertisements

A

○ Sent every 5 mins or whenever there is a change in VLAN configuration
○ Transmitted over native VLAN using multicast frame
○ Includes a configuration revision number incremented by 1 every time a VTP server modifies its VLAN information

31
Q

VTP Bomb

A

Occurs when a VTP server with a higher revision (albeit loaded with potentially incorrect information) of the VTP database is inserted into the production VTP domain causing the loss of VLAN information on all switches in that VTP domain

32
Q

VTP Message Types

A

○ Summary advertisement

○ Subnet advertisement

33
Q

Summary Advertisement

A

○ 5 minute increments
○ Inform adjacent switches of the current VTP domain name and configuration revision number
○ Advertisement request is sent if the revision number of receiving switch is lower than the advertised revision number

34
Q

Subnet Advertisement

A

○ The server where VLAN changes are made increments the configuration revision and issues a summary advertisement
○ Contains a list of VLAN information
○ If there are several VLANs, more than one subnet advertisement can be required to advertise all the VLANs

35
Q

When do switches need a VTP advertisement?

A

If:
○ The switch has been reset
○ The VTP domain name has been changed
○ The switch has received a VTP summary advertisement with a higher configuration revision than its own
○ Upon receipt of an advertisement request, a VTP device sends a summary advertisement

36
Q

EtherChannel

A

A technology that allows you to circumvent the bandwidth issue of heavily solicited links by creating logical links that are made up of several physical links

37
Q

Pros of EtherChannel

A 
○ Higher bandwidth
○ Load balancing
○ Redundancy
○ Simplified configuration
○ Up to 8 links
38
Q

EtherChannel Link Speeds

A

○ Max 1600 Mbps (Fast)
○ Max 16 Gbps (Gig)
○ Max 160 Gbps (10 Gig)

39
Q

EtherChannel Mechanisms

A

○ LACP: IEEE negotiation protocol
○ PAgP: Cisco negotiation protocol
○ Static persistence: no negotiation protocol

40
Q

Link Aggregation Protocol (LACP)

A

○ Ensures that all ports in EtherChannel have the same type of configuration speed, duplex, and VLAN information
○ Up to 16 links can be assigned to an EtherChannel but only 8 can be active at a time (max number of active links varies between switches)

41
Q

LACP Modes of Operation

A

○ Active: Enable LACP

○ Passive: Enable LACP only if an LACP device is detected

42
Q

Port Aggregation Protocol (PAgP)

A

○ Provides the same negotiation benefits as LACP
○ Cisco proprietary
○ Ports with same capabilities are bundled together into an EtherChannel (only on ports that are configured for identical VLANs or trunking)

43
Q

PAgP Modes of Operation

A

○ Desirable: Enable PAgP

○ Auto: Enable PAgP only if a PAgP device is detected

44
Q

EtherChannel Guard

A
  • Used to detect EtherChannel misconfigurations between the switch and a connected device
  • Can be enabled using the spanning-tree etherchannel guard misconfig global config command (is enabled by default)

INFO5082 - Multilayer Switching (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions