Network Engineering Stack Exchange is a question and answer site for network engineers. It only takes a minute to sign up.

Sign up to join this community
Anybody can ask a question
Anybody can answer
The best answers are voted up and rise to the top

Top Questions

7 votes
6 answers
2k views

How Does A Layer 2 Switch Differentiate Between Different Networks?

7 votes
3 answers
649 views

Can I announce the same block of /24 given to me by ARIN at two different locations?

3 votes
5 answers
155 views

Why should I use vlans instead of subnets?

2 votes
4 answers
117 views

How does ARP work, when the host with known MAC address is moved to another subnet

1 vote
1 answer
315 views

MAC address table and frame forwarding on Layer 2 switches - question about when two computers are connected via hub to same switch port

1 vote
2 answers
76 views

Why shortened version of IP4 exists and it is undocumented but supported everywhere?

0 votes
2 answers
67 views

Difference between default routes

0 votes
3 answers
119 views

Do telephone calls work at Layer2?

1 vote
3 answers
58 views

Why switch uses Mac address during implementation of spanning tree protocol (STP)?

0 votes
2 answers
70 views

UDP supports multicasting and broadcasting in transport layer or application layer?

1 vote
3 answers
56 views

Why the host part of a Mask is 254 (256-2) instead of 253?

0 votes
2 answers
53 views

Which access methods and topologies are used for 10/40/100 Giga Ethernet?

0 votes
3 answers
68 views

Are WAN and "backbone" same?

0 votes
1 answer
70 views

How to create a subnet or secondary network? Do I need VLANs?

2 votes
1 answer
53 views

How is the destination MAC address filled during MPLS label switching?

2 votes
1 answer
49 views

Ethernet: How does receiver know end of frame? [duplicate]

0 votes
1 answer
60 views

Why is this 254.63.0.1, not a valid host address?

3 votes
1 answer
44 views

Two multicasts from same source not reaching a destination

0 votes
2 answers
72 views

If coaxial is half duplex, how come it's that fast?

0 votes
1 answer
56 views

Cisco BGP Configuration

0 votes
1 answer
37 views

What is this coupler for?

2 votes
2 answers
37 views

Why is a PoE circuit limited to 328 feet?

0 votes
1 answer
33 views

How can i create this topology in cisco packet tracer?

1 vote
1 answer
32 views

show ip ospf neighbor unexpected results On packet Tracer

1 vote
1 answer
43 views

How to configure a router as a dhcp server for vlans throught a Layer 3 switch?

1 vote
1 answer
55 views

Why iBGP speaker should not modify next hop address?

2 votes
0 answers
54 views

Cisco Access Switches: Monitoring AAA server dead via SNMP?

1 vote
2 answers
32 views

Do PoE lighting systems require a separate network from other PoE systems?

0 votes
1 answer
40 views

Which interface will be the root port in this topology?

0 votes
1 answer
24 views

Does OSPF acknowledge DBD packets with an LSAck?

0 votes
1 answer
30 views

VLAN trunking - how to ping PC4 from PC1?

0 votes
1 answer
23 views

QOS - CPU CoS Weight- pluribus switches

0 votes
1 answer
48 views

How to configure a layer 3 switch for routing vlans?

0 votes
1 answer
46 views

TCP segment with flags ACK, PSH, URG

1 vote
1 answer
35 views

Need help with create Vlan for radios

0 votes
1 answer
35 views

In an SDN (OpenFlow), are all switches directly connected to controller?

0 votes
1 answer
27 views

Will this switch do what I require?

0 votes
2 answers
21 views

IPSEC ESP tunnel mode - Are the ip addresses in outer IP HDR same as addresses in inner encrypted IP HDR?

0 votes
1 answer
33 views

Switch stack with only one

0 votes
1 answer
42 views

Relation between mean delay and network size

0 votes
1 answer
30 views

Switch with 100Mbit and 1Gbit ports - using its full capacity

0 votes
1 answer
35 views

Wireshark: Cannot find frame type of packets

0 votes
1 answer
34 views

Network packet loss and connection drop every hour [closed]

0 votes
1 answer
33 views

HTTP and TCP relationship

0 votes
1 answer
25 views

Show LLDP neighbors history

1 vote
1 answer
25 views

How to change the source port without interrupt the TCP connection? [closed]

0 votes
2 answers
25 views

Extreme 210 fiber port not connecting

0 votes
2 answers
15 views

Simple IPv6 Global Unicast question


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