Questions tagged [network]

For questions about Networking that includes design, and use of a network, the physical cabling, hub, bridge, switch, router, and so forth. Anything in relation to networking and its technologies.

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9 views

Why do I need Bridge mode on my main router to connect a second one? [closed]

I want to buy a better router than the one my ISP provides me. I can't just ditch my ISP router because it is modem and router at the same time. What I've been told is that I would need to set my ISP ...
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14 views

Why is one of the workgroup's network systems disconnected at the same time? [closed]

We have a workgroup network in our company.There are 18 computers and one server in this network. The router connected to the Network switch with cable. In the past few days internet of one of ...
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2answers
44 views

Point to point link with two Internet connections

Thank you in advance for reading this question. I have two buildings, let's say A and B, each connected to the Internet. Devices in A also need to access devices in B and vice-versa. The Internet ...
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15 views

Static Network wont ping pcs across the WAN [closed]

im trying to get pc1 and pc3 to ping each other on a static network. everything is set up correctly but not sure why it wont ping. ive attached an image of the network all devices have a subnet mask ...
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2answers
295 views

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

I have a network switch IC , and I am using to the send BPDU packet. I can send packet with 2 byte ethertype/length field like this : 81 00, 80 00, 91 00 and some special hex number. But if I try to ...
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16 views

Ping is high between ospf routing protocol [closed]

** When I ping ip ospf address on r2 from r1 or r5 my ping is high.
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10 views

Ping is high bettwen ospf routing protocol [closed]

bytes=16 time=1477ms TTL=64 Zeit=1528ms TTL=62 Zeit=185ms TTL=62 Zeit=215ms TTL=62 Zeit=241ms TTL=62 Zeit=238ms TTL=62 Zeit=224ms TTL=62 Zeit=225ms TTL=62 Zeit=131ms TTL=62 Zeit=599ms TTL=62 ...
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29 views

Why do corporate networks prefer application-level over network-level proxies? [closed]

I was recently using an application at work, which was unable to download needed files because proxy settings were not configured for the application. The company firewall blocks non-proxy connections....
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1answer
21 views

ASA shows Action:Drop on packet-tracer, no reason or phase

I am doing a very simple lab with one asa and two computers. PC1 connected to dms PC2 connected to outside : Hardware: ASA5506, 4096 MB RAM, CPU Atom C2000 series 1250 MHz, 1 CPU (4 cores) : ASA ...
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1answer
46 views

Campus Area Network Deisgn [closed]

I have 10 buildings in a campus and I want to design a Network. The design should follow the three layered hierarchical model. Below is my design, I just want to know if the design will work just fine ...
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1answer
85 views

Symmetric routing and asymmetric routing plz elaborate

First of all thanks, Am pretty much confused this both term of routing read blog's and notes but still kinda confused.
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1answer
24 views

PoE only data and power over network

Is ethernet(PoE) the only (power and data) over the network. I did google this I'm dyslexic and dysgraphic so English I tryed
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1answer
46 views

What is underlay and overlay network?

Curios to know about underlay and overlay networks and differences between them.
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3answers
42 views

Can odd or even parity correct errors

Can odd or even parity correct errors? Odd or even parity can be used to detect errors. Can it correct errors?
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9 views

Given a subnet mask, how can I determine which addresses can be assigned to public network hosts? [duplicate]

For example, I'm given a subnet mask of 255.255.255.248 and need to determine from a list - 16.70.118.63 134.178.18.56 200.47.224.159 68.111.178.93 192.168.16.87 217.37.10.192 - which addresses can be ...
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3answers
2k views

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

Suppose you have two NICs with the same MAC address, but not necessarily the same IP address. What is the least possible separation (in terms of number of switches, routers, different IP subnets etc.) ...
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1answer
23 views

Unable to receive logs from a device to our SIEM Syslog server via TCP 514 [closed]

I want to collect logs from a security device (McAfee Email Gateway) to our SIEM Syslog server. This security device can forward logs only via TCP syslog on any port (in our case it is 514). We are ...
3
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1answer
20 views

Cisco ASA5585-X replace SSP-20 with SSP-60

We have cisco ASA5585-X with SSP-20 running in production and we need more power so planning to replace SSP-20 with SSP-60 module but not sure we can just hot swap with SSP-20? Does ASA5585-X support ...
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1answer
30 views

How does triple handshake avoid establishing connection for duplicate packets(coming later down the line)

The idea behind triple handshake seems to be for duplicates to not cause issues. The way I understand it host sends a sequence x to server. Server acknowledges it and sends it's own sequence y. Host ...
2
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1answer
35 views

Why do we need machine learning for QoS classification in SDNs if we have DSCP in IP address for QoS enforcement?

DiffServ (Differentiated services) uses a 6-bit differentiated services code point (DSCP) in the 8-bit differentiated services field (DS field) in the IP header for packet classification purposes. If ...
3
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2answers
222 views

Internetworking packet transfer

What happens when a packet gets lost or corrupted? Mostly flow control is in the data link layer with acknowledgements. Does this happen on network layer as well like among multiple networks. A packet ...
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2answers
46 views

Why is there a need for a MAC address on top of IP address? [duplicate]

The way I understand is that MAC address uniquely identifies a NIC on a global level. IP addresses do not because they may go through a NAT box and the ISP may issue a single external IP address for a ...
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13 views

Building simple network configuration [duplicate]

For the below network configuration I need to propose an IP addresses, netmask and anything else obvious that I am possibly forgetting. The network is built of four Computers, Router and a Switch. I ...
4
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3answers
2k views

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

I understand that an IP adress refers to a NIC and not to a host, therefore a single host can have as many IP adresses as NICs. But Tannenbaum says: It really refers to a network interface, so if ...
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1answer
29 views

Can Northbound interfaces (REST API) in a Software Defined Network (SDN) be used to manipulate QoS parameters?

I am working on a project involving Quality of Service (QoS) manipulation in Software Defined Networks (SDNs). I know that the following parameters affect the QoS in an SDN: Time information (inter-...
2
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1answer
39 views

How a wireless access point reads all the available SSIDs

When a wireless access point is broadcasting its SSID (beacon frame) I assume it sends it on specific selected channel (channel 1-14 for 2.4 GHz network). But how do all the other access point ...
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0answers
13 views

Which mask to use for 1024 address size subnet [duplicate]

I am trying to identify if given IPs are from same 1024 SUBNET. 192.168.3.1 192.168.2.19 192.168.1.1 The part I got stuck is that SUBNET address size is 1024. If I am sure, by checking IP addresses ...
2
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1answer
65 views

Information on TEXNET

Anyone familiar with the TEXNET protocol? I have 35 machines in an industrial setting that are from the late 1990's that use a TEXNET protocol to communicate with a PC system. Is there anyway to ...
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0answers
11 views

How to divide an IPv4 network into three separate networks? [duplicate]

I have an address of 192.168.100.0(/24) and I need to separate it into three networks using VSLM. One needs 70 hosts, another needs 30 hosts and the last needs 25 hosts. What is the most efficient way ...
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2answers
41 views

Can I set up a WLAN with a WAP but without Internet?

I was able to set up a LAN with the following configuration : A main computer (Windows PC) with a DHCP and DNS server, who is configured to have a static IP address Three devices (embedded Linux) ...
2
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1answer
63 views

Actual Network speed for multi port adaptor

I get confused with speed of adaptors having multiple ports. E.g. chelsio T-520CR is 10Gbits dual port adaptor. Does this means both ports have 10Gbits speed i.e. effective 20Gbits or total speed ...
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1answer
54 views

Is there a method to modify bits in IP packets with OpenFlow?

We've already known that ovs-ofctl provides many actions to modify packets like set_field, load, move... but I can't find a suitable action or action combination to modify a bit in the IP packet ...
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2answers
49 views

Applying WAN Changes to Juniper Chassis Cluster

I have a Juniper SRX 340 in a chassis cluster state. I am looking to change the WAN IPs used by the firewalls as the ISPs will change. I have GE interfaces that have sub interfaces within them 1,2,20,...
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2answers
97 views

MTU 9000 and 1500 when machines with MTU 1500 send data to machines with MTU 9000

we have some machines in the cluster linux machines as Linux_a , linux_b are configured with MTU 1500 while linux machines - linux_1 and linux_2 are configured with MTU 9000 so linux machines - ...
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1answer
68 views

Cisco 2960 radius configuration

I have multiple cisco switches like Nexus family and IOS family switches and now i am trying to configure centralized authentication so i have install Freeradius and freeIPA (ldap server) I have ...
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1answer
35 views

Enterprise network VS Industrial network [closed]

I would like to know the difference between the enterprise network and industrial Network.If someone has experience in industrial network, is he able to work in enterprise network?
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1answer
42 views

Setting the network address freely [duplicate]

I'm trying to understand IP Addressing, but there's something what's still not clear for me. With mask 1111111.1111111.1111111.00000000 (/24) Am I able to set network address "freely" like this? ...
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0answers
13 views

How to calculate bits needed for host, bits left for network, number of available networks? [duplicate]

I have a class b address of 145.14.0.0 I need to create a scheme where each subnet accommodates 2259 hosts. can someone explain step by step how to do that
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1answer
35 views

TCP implementation [closed]

Can one speed up TCP transmission of packets if the no.of bits in sequence field and no. Of bits in acknowledgement field are reduced ? If yes , then how much time is saved? Mathematical equations for ...
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0answers
40 views

Compatible peap+freeradius+openldap

On my new job I have inherited a service wpa2-enterprice with peap+freeradius+openldap. As NAS we use ArubaIAP with enabled function "eap-termination". And this bundle works well! Little deep: In ...
0
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2answers
51 views

what is the purpose and meaning of “://” and how is it used [closed]

When going to a website we see https://example.com, I know the purpose of http and https protocols, but what is the purpose of "://" after? I know "\" is being used for directories, but still dont ...
2
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1answer
69 views

Nmap differences between scanning with -Pn or without

I'm trying to understand the difference in NMAP between put -Pn or not. I know that if I'm not mistaken -Pn skip ICMP (ping) scan. Ok.. so I try scan a random VM and intercept the packets with tcpdump....
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2answers
54 views

Do all computers on a wifi network have the same Network ID in their IP address?

I'm trying to clear something up that I haven't been able to get a simple answer to. If I have multiple computers on the same wifi network, is it correct that they will have the same network ID, but ...
0
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1answer
61 views

Why computers can communicate on different networks and routers won't?

I have a problem that I can not understand it myself and I need some help. I'm doing a kind of challenge, well network challenge in cisco packet tracer. I have a .pka file that stands for Cisco Packet ...
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1answer
43 views

How is IP tramsmitted from client to server? I checked HTTP requests but its not there [closed]

how do websites know our IP? I checked in HTTP requests, headers and everything is there but no IP why so?
2
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1answer
41 views

Cisco configure RADIUS with local account same time

In LAB i am working on Cisco authentication with freeradius and everything works but i want my cisco switch first lookup in radius and if user didn't find then it go to local database. currently i ...
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0answers
100 views

How to check vlan interface traffic on Cisco nexus 9k

I have Cisco N9K-C9396PX L3 switch which has VLAN interface configured for my LAN gateway and i want to monitor how much traffic vlanXXX handling, I have configured SNMP monitoring to pull interface ...
1
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1answer
50 views

Port mirroring question

I've got some questions about my port mirroring configuration. I'm working with alcatel omniswitch. After configuring port mirroring my destination port is loosing network connection and it can't ...
3
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2answers
92 views

What is the advantage of Supervised Machine Learning over Deep Packet Inspection in Network Traffic Classification?

As per the definition of Deep Packet Inspection (DPI), it uses signatures for packet filtering. Supervised Machine Learning can help put a label on a packet which does not get identified by Deep ...
1
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1answer
42 views

Does Network segmentation work using different switches connecting to router?

I just learnt basic networking. If I have 2 departments which I do not want them to access each other's networks, does using two layer 2 switches connecting to the router does the job or do I need a ...

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