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General Network Knowledge > Who Wins > Flashcards

Who Wins Flashcards

1
Q

In Routing Protocol Metrics which route wins?

A

Lowest

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2
Q

In Routing Protocol Administrative Distances, which AD wins?

A

Lowest

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3
Q

In Spanning Tree, what determines the Root Bridge?

A

Lowest priority and the lowest base MAC address

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4
Q

In RIP what determines the Metric?

A

Hop Count

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5
Q

In OSPF what determines the Metric?

A

The sum of all Outgoing Interface Costs to get to the network.

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6
Q

In EIGRP what determines the Composite Metric?

A

Metric = (( 10^7 / least_bandwidth in Kbps ) + Cumulative Delay ) * 256

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7
Q

In Spanning Tree, which Bridge ID wins?

A
  • Lowest priority in the BID first
  • If priorities tie then lowest MAC address
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8
Q

In OSPF, which router becomes the Designated Router?

A

Router with the highest Priority, if a tie then highest Router ID

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9
Q

In OSPF, which router becomes the Backup DR?

A

BDR election also uses highest priority and then highest router-id.

When a new network segment is initialized the first election is for BDR. The elected BDR recognizes that there is not a DR and becomes DR and there is another election for a BDR.

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10
Q

When checking delay on an interface using the ‘show ip eigrp top’ command what unit of measure is delay in?

A

Microseconds

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11
Q

In order to use Delay in the EIGRP metric formula what must you before adding the Delay measurement?

A

Take Microseconds and Divide by 10.

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12
Q

In Spanning Tree, how is the root port determined?

A

Whichever port has the least OUTBOUND Interface Cost to get to the Root.

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13
Q

HSRP Active Router

A

Highest priority wins

Tie breaker - Highest IP address

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14
Q

In Spanning-tree, which Port Priority is better? Default is 128.

A

Lower is better.

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15
Q

LACP System Priority

A

Lowest

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16
Q

LACP Port Priority

A

Lowest

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17
Q

In an IGMP Querier Election

A

Lowest LAN interface IP address

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18
Q

In PIM when identifying the RPF interface, if 2 interfaces have the same AD and metric back to the source?

A

The interface with the highest IP address wins

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19
Q

in multicast, two PIM Forwarders on the same LAN

A
  • lowest administrative distance
  • lowest metric back to the source
  • then highest IP address
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20
Q

Multiple PIM routers on the same subnet.

A
  • Highest DR Priority value
  • Tie breaker - Highest IP address on the subnet
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21
Q

Multicast with Auto RP when multiple C-RPs advertise themselves.

A

Highest IP address wins and becomes the active RP

22
Q

C-BSR election

A
  • Highest Priority
  • If tie then C-BSR with highest IP address wins
23
Q

PIM Routers run algorithm on BSR-provided Group-to-RP Mapping Cache to choose an RP. Which candidate wins?

A
  • C-RP with the longest prefix match, if a tie then,
  • C-RP with the Lowest Priority wins, if a tie then,
  • C-RP with highest hash value, if still a tie then,
  • The highest IP address wins
24
Q

crypto isakmp policy [priority]

A

The lowest number wins. Lowest number possible is 1.

25
Q

BGP neighbors both propose different HOLD times. Who wins?

A

The shortest HOLD time wins.

26
Q

In QOS using the CS PHB with values CS0 thru CS7, which one gets better priority?

A

CS7 - the higher the CS the better the priority

27
Q

For layer 2 QOS the Priority Code Point (PCP) using Class of Service with 8 levels

A
  • CoS 0 is lowest and treated worst
  • CoS 7 is highest and treated best
28
Q

In Wireless, SNR (signal-to-noise ratio)

A

A larger SNR value is better. The larger the number the larger the gap is between the noise floor and the receiver’s sensitivity level

29
Q

In Wireless, channel utilization

A

The lower the better

30
Q

In Wireless, Signal Strength

A

Signal strength of -50 is better than -70

31
Q

In Wireless, connection score

A

in percentage with 100% being the best

32
Q

In Wireless, Received Signal Strength Indicator (RSSI)

A

-50 dBm is better than -70 dBm

33
Q

BGP PA - Weight

A

Higher value wins

34
Q

BGP PA Local Pref - lower or higher?

A

Higher is preferred

35
Q

BGP Path Attribute - MED

A

The lower the MED the more preferred it is

36
Q

In BGP who manages the connection during the Connect State

A

Router with the higher BGP router ID

37
Q

BGP PA AIGP Metric

A

Lowest wins

38
Q

BGP PA IGP metric to next hop.

A

Lowest wins

39
Q

BGP PA Peer router ID

A

Lowest wins

40
Q

BGP PA Peer IP address.

A

Lowest wins

41
Q

Under ‘router ospf’ if an interface matches two network statements each specifying a different area which area/network statement is chosen?

A

The area with the longest matching network statement wins

42
Q

If OSPF is configured directly on an interface plus the interface is included in a network statement under router OSPF which takes precedence?

A

The interface config trumps the network statement.

43
Q

OSPF authentication: which key in the key chain will OSPF use to sign egress packets?

A

The key with the highest key ID

44
Q

OSPF: Who wins when there are conflicting parameters between what is under the router process configuration and what is on the interface

A

Interface parameters take precedence

45
Q

OSPF: when there is a conflict between what is directly under the “router ospf” command and what is under ‘address-family’

A

Address-family wins

46
Q

OSPF: which Hello timer will IPv6 use in the following example:

interface gig0/0
ip address 10.1.1.0 255.255.255.0
ipv6 address 2001:DB8:0:12::2/64
ospfv3 10 hello-interval 11
ospfv3 10 ipv6 area 0
ospfv3 10 ipv6 hello-interval 10
ospfv3 10 ipv4 area 0

A

The Hello timer specified with the address family will take precedence over the Hello timer without an address family

47
Q

In MPLS, which LDP neighbor gets the passive Server role?

A

The router with the lowest LDP ID

48
Q

In BGP, which takes priority between conflicting statements in a BGP Peer Group and in a BGP neighbor statement.

A

BGP Neighbor Statement wins

49
Q

In IPV6 First Hop Security Features - IPv6 Snooping, there are 2 policies, one for the VLAN and one for the interface. Which takes precedence?

A

The policy on the interface.

50
Q

In OSPF, if the exact same route is advertised in Type 7 LSAs by 2 different ASBRs which route is preferred?

A

The route coming from the ASBR with the lowest Router ID.

General Network Knowledge (29 decks)

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