Hottest Questions This Month

15 votes

5 answers

4k views

Why do we need ports with IPv6?

manish ma

1,498

modified Sep 3 at 16:01

5 votes

2 answers

578 views

Can a jumbogram (giant data packet) be used at a large scale (in WAN for example)?

Ron Maupin♦

94.6k

modified Sep 14 at 1:15

4 votes

2 answers

545 views

Why is a virtual MAC address needed in FHRP protocols?

Teun Vink♦

15.8k

answered Sep 18 at 20:48

4 votes

1 answer

340 views

Layer choice for OSPF

Ron Maupin♦

94.6k

modified Sep 11 at 22:57

3 votes

1 answer

132 views

A question about DR/BDR routers in OSPF

Eddie

14.1k

modified Sep 15 at 15:49

3 votes

2 answers

101 views

Show port on Cisco switch that mac address is being dropped on

manish ma

1,498

modified Sep 16 at 9:34

1 vote

1 answer

118 views

Can a switch fragment a jumbo frame?

Ron Maupin♦

94.6k

modified Sep 10 at 17:34

0 votes

2 answers

75 views

can we use RJ45 with cat7 sftp?

Zac67♦

72.8k

modified Sep 11 at 4:34

0 votes

1 answer

47 views

How to change the AS number without losing the old BGP configuration?

Marc 'netztier' Luethi

7,867

modified Sep 19 at 15:54

1 vote

1 answer

70 views

Hot potato routing topology

Zac67♦

72.8k

modified Sep 21 at 11:23

1 vote

1 answer

77 views

Does each computer/smart phone use electromagnetic wave with different frequency to communicate when they're connected to a WLAN?

Ron Maupin♦

94.6k

answered Sep 12 at 14:57

0 votes

1 answer

42 views

Warning: portfast should only be enabled on ports connected to a single host

Ron Trunk

63.4k

answered Aug 31 at 18:31

0 votes

1 answer

40 views

policy based routing to send one host to a different internet gateweay

longneck

464

modified 19 hours ago

1 vote

1 answer

59 views

Private VLAN: gateway and DHCP for isolated VLANs over multiple switches (Extreme)

someonr

111

modified Sep 9 at 10:11

1 vote

2 answers

34 views

Is it okay to not assign an IP address to the physical interface of router when used for "Router on a Stick"?

Zac67♦

72.8k

modified Sep 22 at 16:31

1 vote

1 answer

67 views

Cisco ASA not accepting external traffic without NAT configuration

adrianlzt

121

answered Sep 12 at 21:36

0 votes

1 answer

37 views

Routing question

JFL

18.5k

modified Sep 19 at 15:33

0 votes

1 answer

37 views

How would a switch know that it should forward a frame through a different interface in a STP topology?

Zac67♦

72.8k

answered Aug 28 at 15:12

1 vote

1 answer

47 views

How does QUIC provide delivery guarantee?

Zac67♦

72.8k

modified yesterday

0 votes

2 answers

45 views

Adding switch to domain, do I need to use vlan

Jwelc

11

answered Sep 9 at 17:03

0 votes

1 answer

42 views

How does OSPF know the cost of the interfaces between the router and the destination network?

Zac67♦

72.8k

answered Sep 17 at 20:40

0 votes

2 answers

42 views

What is considered a LAN segment in this STP explanation?

frknl

1

modified Aug 30 at 20:44

0 votes

1 answer

48 views

What could be blocking ARP?

longneck

464

answered Sep 3 at 20:53

2 votes

1 answer

36 views

What is Ethernet MDI in the case of SFP interfaces

Zac67♦

72.8k

modified Sep 13 at 16:51

0 votes

2 answers

33 views

Cisco 2960-X IOS Version 15.2 can't use command access-session control-direction both

Marc 'netztier' Luethi

7,867

modified Sep 7 at 16:01

0 votes

1 answer

23 views

When a new entry in the NAT table is created and an entry in the NAT table is removed?

Ron Trunk

63.4k

answered Aug 28 at 14:02

0 votes

1 answer

37 views

In a PE-CE network, we would redistribute routes between BGP and IGP without `bgp redistribute-internal`. How does redistribution works?

manish ma

1,498

answered Sep 5 at 17:49

0 votes

1 answer

28 views

Can QUIC prevent DNS/NTP amplification for DDOS

Zac67♦

72.8k

answered Sep 20 at 10:42

2 votes

2 answers

45 views

TCP MSS - Dynamic Adjustment

Zac67♦

72.8k

modified Sep 10 at 16:37

1 vote

1 answer

27 views

Why does TCP sender drop rate 50% on lost-packets?

Zac67♦

72.8k

answered Sep 23 at 14:45

1 vote

2 answers

34 views

Why do 802.1Q trunk ports drop tagged frames with the same ID as the native VLAN?

Zac67♦

72.8k

answered Sep 17 at 16:23

0 votes

1 answer

41 views

Why there is not layer3 in Mark's laptop?

Zac67♦

72.8k

modified 15 hours ago

1 vote

1 answer

27 views

What happens if the layer 2 destination MAC address mismatches?

Zac67♦

72.8k

modified yesterday

0 votes

1 answer

34 views

Naming ASN something else than "default", Cisco IOS XR

Pat Res

1

modified Sep 20 at 11:30

0 votes

1 answer

32 views

Why should we replicate route before doing inter-vrf redistribution

Deepak

565

modified Sep 6 at 15:09

0 votes

0 answers

32 views

How to NAT a unicast address to a broadcast address?

O. Salah

1

modified Sep 15 at 22:01

0 votes

1 answer

19 views

iBGP running only between BGP border routers?

Ron Trunk

63.4k

answered Sep 12 at 15:35

0 votes

1 answer

31 views

Policy Based Routing on Cisco Nexus 9300

Zac67♦

72.8k

answered Aug 30 at 7:54

0 votes

1 answer

22 views

Many SYN_RECV connections in netstat [closed]

Zac67♦

72.8k

answered Sep 11 at 10:48

0 votes

0 answers

26 views

(Wireshark) how to filter TCP connections

NetworkEngineer1234567

1

modified Sep 20 at 6:45

0 votes

1 answer

19 views

Understanding output of "ip route get" [closed]

Zac67♦

72.8k

modified Aug 29 at 7:48

0 votes

2 answers

20 views

wireshark is not capturing my target packets

john

1,227

answered 8 hours ago

0 votes

0 answers

19 views

Difference between host-to-host and process-to-process communication [closed]

Mitrixsen

295

asked Sep 19 at 12:43

0 votes

1 answer

19 views

Where are the GCP Firewall logs?

Mike Pennington

29.6k

answered Sep 15 at 19:00

0 votes

0 answers

19 views

Hide FTP login details from the running config

Ron Maupin♦

94.6k

modified Sep 2 at 16:29

0 votes

0 answers

19 views

How can I find or produce 60s style rack mount panels? [closed]

60sChic

1

asked Sep 23 at 2:34

0 votes

0 answers

18 views

Subnetting within an existing Production subnet [closed]

ShadowFox

1

asked Sep 19 at 15:04

0 votes

0 answers

17 views

ACL to allow just Internet access to include DHCP and DNS [closed]

Zac67♦

72.8k

modified Sep 21 at 14:18

Top Questions

Looking for more? Browse the complete list of questions, or popular tags. Help us answer unanswered questions.