Hottest Questions This Month

17

votes

5

answers

8k

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Usage of 192.168.xxx, 172.xxx and 10.xxx in private networks

ipv4

modified Jan 22 at 21:20 Citizen 379

31

votes

2

answers

6k

views

Why does the IPv6 header not include a checksum?

ip protocol-theory ipv6 checksum

modified Jan 27 at 13:50 Philipp 301

13

votes

4

answers

3k

views

Difference between :: and ::1

ip protocol-theory ipv6 ip-address

modified Feb 6 at 16:48 Community♦ 1

7

votes

6

answers

3k

views

What happens with a ping when it enters a network? Is the router the one answering with a reply?

ip protocol-theory ping

modified Jan 23 at 10:18 Zac67 46.3k

13

votes

3

answers

2k

views

What is the least possible separation of two NICs with the same MAC address?

network mac-address networking

answered Feb 1 at 22:32 Alex Ignatov 1

4

votes

5

answers

2k

views

How does a host in one subnet know to forward the packet to the router MAC, when trying to send a packet to another subnet

router ethernet subnet arp gateway

modified Feb 12 at 7:15 Zac67 46.3k

4

votes

3

answers

2k

views

Why can a host with a single NIC and on two networks have 2 IP adresses?

ip network protocol-theory ip-address

modified Jan 23 at 21:09 T.J.L. 103

1

vote

1

answer

1k

views

Worst-case efficiency of PPP escaping mechanism

protocol-theory bandwidth pppoe ppp

modified Feb 6 at 16:00 jonathanjo 14.8k

5

votes

3

answers

1k

views

Unknown EtherType

ethernet packet-analysis

modified Jan 24 at 13:29 Martin Rosenau 1,583

4

votes

2

answers

711

views

Confusion about data fragmentation/MTUs - why was it introduced in the first place?

ip layer2 layer3 mtu fragmentation

modified Feb 9 at 20:51 Ron Maupin♦ 78k

3

votes

2

answers

222

views

Internetworking packet transfer

network

modified Jan 23 at 20:25 Ron Trunk 49.1k

3

votes

2

answers

419

views

How is the term “fabric” defined in networking?

networking terminology network-theory

modified Feb 7 at 19:44 Community♦ 1

2

votes

2

answers

295

views

Why the network switch drop the frame acording to ethertype/length?

switch ethernet network

modified Feb 13 at 18:00 Zac67 46.3k

1

vote

2

answers

121

views

Can TCP stand for “Transport Control Protocol”

tcp transport-protocol layer4 terminology

modified Feb 5 at 11:49 jonathanjo 14.8k

1

vote

2

answers

278

views

MTU the most Confusing Networking term. Lot of questions

ethernet ipv4 mtu pmtud

modified Feb 10 at 16:44 Ron Trunk 49.1k

2

votes

1

answer

273

views

How to determine the required performance of my router?

throughput cisco-isr

modified Feb 3 at 9:59 jonathanjo 14.8k

0

votes

3

answers

90

views

Single-homed connection to ISP without NAT feature

nat bgp isp gateway

modified Jan 31 at 20:25 Zac67 46.3k

2

votes

2

answers

100

views

Can a single subnet work across several switches?

switch subnet switching networking trunk

answered Jan 19 at 17:46 Darrell Root 1,564

0

votes

1

answer

90

views

How can I legally get a software upgrade for my Cisco Wireless controller without a service contract so it supports my more recent access-point?

access-point cisco-wireless license

modified Jan 27 at 20:11 Darrell Root 1,564

0

votes

2

answers

134

views

Configuring a network for 100% isolation (for security)

routing switch vlan firewall security

answered Jan 28 at 10:48 camp0 259

0

votes

1

answer

189

views

Filtering out abnormal connection termination packets in wireshark

wireshark

answered Feb 11 at 19:29 Yevhen Stasiv 46

3

votes

1

answer

114

views

Layer 2/3 Ring with VRRP/OSPF

ospf vrrp

modified Feb 12 at 22:13 Alan Leigh-Lancaster 33

1

vote

1

answer

85

views

Symmetric routing and asymmetric routing plz elaborate

network networking network-core network-theory network-measurement

answered Feb 9 at 15:19 kubn2 411

2

votes

1

answer

45

views

Why can't get host's mac address on l2 switch through snmp? But can get it on l3 router

cisco switch switching snmp

modified Feb 14 at 15:02 Ron Maupin♦ 78k

2

votes

2

answers

44

views

What is VRRP used for?

protocol-theory vrrp fhrp

answered Jan 21 at 18:43 Zac67 46.3k

0

votes

1

answer

69

views

How can 10Gbps travel over a 500mhz ethernet cable?

ethernet

modified Feb 6 at 17:51 Zac67 46.3k

0

votes

2

answers

39

views

Routing question on a Cisco router

routing

answered Feb 13 at 9:35 Yevhen Stasiv 46

2

votes

1

answer

101

views

How to read a BGP table?

routing bgp

answered Jan 27 at 22:15 kubn2 411

1

vote

1

answer

78

views

Removing VLANs from core trunks (.1q)…?

lan networking trunk cisco-nexus-7k

modified Jan 27 at 14:16 Marc 'netztier' Luethi 6,509

2

votes

1

answer

76

views

Cisco C3750X power supply: difference between /1 vs /2?

cisco-catalyst

modified 11 hours ago jonathanjo 14.8k

1

vote

2

answers

95

views

Internet Scale Routing Table Size

routing bgp internet ip-forwarding-table

modified Feb 5 at 6:24 ditrapanij 328

2

votes

2

answers

44

views

Best way to Fast Reconnect TCP with dynamic IP

ip tcp latency

modified Feb 14 at 14:12 Marc 'netztier' Luethi 6,509

0

votes

3

answers

42

views

Can odd or even parity correct errors

network

modified Feb 6 at 15:03 Zac67 46.3k

1

vote

2

answers

51

views

Question about the destination IP inside an IPv4 packet

ip ipv4 ip-address layer2 layer3

answered Feb 4 at 7:12 Martin Rosenau 1,583

1

vote

1

answer

62

views

DAD and link local address

ipv6

modified 19 hours ago Jens Link 4,717

2

votes

1

answer

57

views

Cisco IOS: DNS Servers via DHCP

dhcp dns cisco-ios-15 ios-xe

modified Feb 12 at 10:05 Marc 'netztier' Luethi 6,509

0

votes

1

answer

53

views

Why is this subnet config required by my vlan “snake topology”?

vlan subnet topology route

modified Jan 31 at 22:44 Zac67 46.3k

2

votes

1

answer

68

views

Lightweight AP won't join with Wireless Lan Controller

cisco wireless access-point cisco-wlc

answered Jan 27 at 4:27 YLearn♦ 25.5k

3

votes

1

answer

40

views

Transient looping problems in Link State Routing versus Persistent looping problem in Distance Vector routing

routing ospf rip

modified Jan 20 at 17:41 Bobby Voychine 331

1

vote

2

answers

65

views

BGP rule to avoid given ISP?

bgp

answered Jan 23 at 19:15 Ricky Beam 24.1k

1

vote

2

answers

46

views

Cisco Nexus 7009 line card replacement

cisco-nexus

modified Feb 14 at 11:01 redlancer100 11

1

vote

1

answer

59

views

Slow(er) network speed due to possible VPN configuration issue?

cisco-asa vpn

modified Feb 13 at 15:40 Marc 'netztier' Luethi 6,509

2

votes

1

answer

59

views

Are there other protocols for enforcing AAA besides RADIUS?

ieee-802.11 access-point radius

answered 9 hours ago YLearn♦ 25.5k

1

vote

2

answers

44

views

Point to point link with two Internet connections

routing wireless network point-to-point

modified 10 hours ago Giulio Ganzerli 29

1

vote

1

answer

44

views

Why are subnetting exercises done by manipulating numbers at the binary level?

cisco

modified yesterday jonathanjo 14.8k

0

votes

1

answer

43

views

Questions regarding incoming packets at optical splitter from optical line terminator (OLT)

layer1 fiber passive-optical-network ftth

modified Feb 5 at 23:02 Ron Maupin♦ 78k

1

vote

1

answer

40

views

Meaning of A and B in Wireshark Conversation View

wireshark

answered Jan 30 at 17:25 Ron Trunk 49.1k

1

vote

1

answer

38

views

Can LLDP be used by other end devices besides VoIP phones?

lldp

answered Jan 22 at 7:25 Zac67 46.3k

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