Ccna Data Center 640-916 Chapter 1: Data Center Network Architecture

Front 1

VLAN

Back 1

Virtual VLAN

A group of devices, connected to one or more switches, with the devices grouped into a single broadcast domain through switch configuration. VLANs allow switch administrators to separate the devices connected to the switches into separate VLANs without requiring separate physical switches, gaining design advantages of separating the traffic without the expense of buying additional hardware.

Front 2

vPC

Back 2

Virtual Port Channel

Virtual port channel. Allows links that are physically connected to two different Cisco Nexus 5000, 7000, 9000, and UCS Series devices to appear as a single port channel to a third device. The third device can either be a Cisco Nexus 2000 Series Fabric Extender, a switch, a server, or any other networking device. vPC can provide Layer 2 multipathing, which allows creating redundancy by increasing bandwidth, enabling multiple parallel paths between nodes,and load-balancing traffic where alternative paths exist.

Front 3

NIC

Back 3

Network Interface Card

A computer card, sometimes an expansion card, and sometimes integrated into the motherboard of the computer that provides the electronics and other functions to connect to a computer network. Today, most NICs are specifically Ethernet NICs, and most have an RJ-45 port, the most common type of Ethernet port.

Front 4

ACI

Back 4

Application Centric Infrastructure

Cisco data center architecture with centralized automation and policy-driven application profiles. ACI delivers software flexibility with the scalability of hardware performance. Key characteristics of ACI include simplified automation by an application-driven policy model, centralized visibility with real-time application health monitoring,open software flexibility for DevOps teams and ecosystem partner integration, scalable performance and multitenancy in hardware.

Front 5

MTU

Back 5

Maximum Transmission Unit

In computer networking, the MTU of a communications protocol of a layer is the size (in bytes) of the largest protocol data unit that the layer can pass onward.

Front 6

LACP

Back 6

Link Aggregation Control Protocol

802.3ad The IEEE standard for Ethernet. The Link Aggregation Control Protocol (LACP)(802.3ad) for Gigabit Interfaces feature bundles individual Gigabit Ethernet links into a single logical link that provides the aggregate bandwidth of up to four physical links.

Front 7

STP

Back 7

Spanning Tree Protocol

A protocol that uses the spanning tree algorithm, allowing a switch to dynamically work around loops in a network topology. Switches exchange bridge protocol data unit (BPDU) messages with other switches

Front 8

VDC

Back 8

Virtual Device Context

Partitions a single physical device into multiple logical devices that provide fault isolation, management isolation, address allocation isolation, service differentiation domains, and adaptive resource management. You can manage a VDC instance within a physical device independently. Each VDC appears as a unique device to the connected users.A VDC runs as a separate logical entity within the physical device, maintains its own unique set of running software processes, has its own configuration, and can be managed by a separate administrator.

Front 9

CFSoE

Back 9

Cisco Fabric Services Over Ethernet

A reliable state transport mechanism you can use to synchronize the actions of the vPC peer devices. CFSoE carries messages and packets for many features linked with vPC, such as STP and IGMP. Information is carried in CFS/CFSoE protocol data units (PDUs).

Front 10

HSRP

Back 10

Hot Standby Router Protocol

A Cisco proprietary redundancy protocol for establishing a fault-tolerant default gateway, described in detail in RFC 2281.

Front 11

VRRP

Back 11

Virtual Router Redundancy Protocol

Specifies an election protocol that dynamicallyassigns responsibility for a virtual router to one of the VRRP routers on a LAN. The VRRP router controlling the IP address(es) associated with a virtual router is called the master, and forwards packets sent to these IP addresses. The election process provides dynamic fail over in the forwarding responsibility should the master become unavailable. This allows any of the virtual router IP addresses on the LAN to be used as the default first hop router by end-hosts.

Front 12

IGMP

Back 12

Internet Group Management Protocol

A TCP/IP network layer protocol that reports errors and provides other information relevant to IP packet processing.

Front 13

TTL

Back 13

Time to LIve

or hop limit. A mechanism that limits the lifespan or lifetime of data in a computer or network. TTL may be implemented as a counter or timestamp attached to or embedded in the data. After the prescribed event count or timespan has elapsed, data is discarded.In computer networking, TTL prevents a data packet from circulating indefinitely. Incomputing applications, TTL is used to improve performance of caching or to improve privacy.

Front 14

DRAP

Back 14

Dynamic Resource Allocation Protocol

An extension to FabricPath IS-IS that ensure network wide unique and consistent switch IDs and FTAG values.

Front 15

BPDU

Back 15

Bridge Protocol Data Unit

A frame that contains information about the Spanning Tree Protocol (STP). Switches send BPDUs using a unique MAC address from its origin port and a multicast address as destination MAC (01:80:C2:00:00:00). For STP algorithms to function,the switches need to share information about themselves and their connections, which are BPDUs. BPDUs are sent out as multicast frames to which only other Layer 2 switches or bridges are listening.